document.onmouseover = function ( e ) {   
    if ( !e ) e = window.event;   
    var el = e.target ? e.target : e.srcElement;   
    while ( el != null && el.tagName != "A" ) el = el.parentNode;   
    if ( el == null ) return;   
    if ( e.preventDefault ) e.preventDefault();   
    else e.returnValue = true;
};

document.onmousedown = function ( omd ) {   
    if ( !omd ) omd = window.event;   
    var el = omd.target ? omd.target : omd.srcElement;   
    while ( el != null && el.tagName != "A" ) el = el.parentNode;   
    if ( el == null ) return;   
    if ( omd.preventDefault ) omd.preventDefault();   
    else omd.returnValue = true;
};


var url_prefix='';
var pause_colour='#DAFF59';

var bg_shaded_colour='#B1E6FF';var gamerunning=false;
var d;// only used once as difference between now and pausedtime
var nu;// current time for comparison
var timer_time;// current time for the timer
var old;
var lo=0;//rename
var m=0;//rename solved_count?
var oh='';// most recent square mouseovered?
var selected_area='';//os renamed selected_area
var given=[];//g renamed given, given numbers and dots
var pm_num=[];//n renamed pm_num
var c=[];//id used by each unsolved square, indexed by row and column
for (var i=0;i<9;i++) {c[i]=[]}
var gl=[];//used by left/right etc functions, read-only

//var rc_map=[];// row column map, to replace gl, use later when re-numbered
//var counter = 0;
//for (var y=0; y<9; y=y+3) {
//	for (var x=0; x<9; x=x+3) {
//		for (var j=y; j<y+3; j++) {
//			for (var i=x; i<x+3; i++) {
//				rc_map[counter] = [i,j];
//				counter++;
//			}
//		}
//	}
//}

var ed=[];// entered solved numbers

var mb=[];//recent mouseovers/mouseouts?
var last_mousedown = '';

var O='&nbsp;';
var started=false;//st renamed started
var mode='';
var selnote=0;
var secs;//could make local to updateTime()?
var mins;//could make local to updateTime()?
var hours;//could make local to updateTime()?
var rtmp=true;
var unpressed=true;
var complete=false;
var flagreset = false;//could remove?
//var laste;

//new vars
var gamepaused=false;
var pausedtime;
var bg_shaded=[];
var saved_sudoku = false;
var gamefrozen=false;
var gamesolution=false;
var pm=0;
var colon_old;
var colon;
var square_size = 51;
var js_gh = 38;
var pm_width = 8;
var pm_height = square_size-js_gh-2;//square_size-js_gh-2;
var autotab = false;
var need_operafix = false;
var mobile_device = false;
var mouseovers = true;
var pmspace = '&nbsp;';
var pm_html_5 = ' onmousedown=\'eh(2,"no';
var eh_in_href = false;
var gu_ahref = '<a href=\'javascript:na()\' class="null_link">';
var guab = '&nbsp;';//var no_test = true;
var flash_top='287';

// vars that used to be at bottom
var pm_html_1 = "<a href='javascript:na()'";
var pm_html_2 = ' onmouseover=\'na(0,"n';
var pm_html_3 = '")\' onmouseout=\'na(1,"n';
var pm_html_4 = '"'+")'";
//var pm_html_6 = '"'+",\"no\",\"\",null)' id='n";
var pm_html_6a = '"'+',"';
var pm_html_6b = '")\' id=\'n';
var pm_html_7 = "' class='noted'>";
var pm_html_8 = '</a>';

//var guaa = '<a href=\'javascript:na()\' class="null_link">';
//var guab1 = '<img name="pixel" id="pixel" src="'+url_prefix+'/images/pixel.gif" border="0" width="'+square_size+'" height="'+js_gh+'">';
//var guab2 = '&nbsp;';
var guac = '</a>';

onerror = ec;
function ec(e,u,l) { 
	//alert(e+';'+u+';'+l);
	return false; }

function docRef(element) {
	if (element) {
		if (document.getElementById) {
			if (document.getElementById(element)) {
				var ref = document.getElementById(element).style;
			}
		}
        else {  }
		return ref
	} else {return null;}
}

function htmlRef(element) {
	if (element) {
		if (document.getElementById) {
			if (document.getElementById(element)) {
				var ref = document.getElementById(element);
			}
		}
        else {  }
		return ref 
	} else {return null;}
}

// make into something useful later
function gb(s) {
		var a=[];//moved into function
	a=s.split('');
	var k=0;
	var la=[0,9,18,3,12,21,6,15,24,27,36,45,30,39,48,33,42,51,54,63,72,57,66,75,60,69,78];
	for (var i=0;i<27;i++) {
		for (var j=0;j<3;j++) {
			//g[la[i]+j]=a[k++];
		}
	}
    // debug array
    //var test_string = '';
	//for (i=0; i<g.length; i++) {
	//	test_string += ' g[' + i + '] '  + g[i];
	//}
	}


// called by 'gu', 'no', 'n' elements of the grid on mouseaction, and by left() right() up() down() tab() shifttab()
// t=0 for onmouseover, t=1 for onmouseout, t=2 for onmousedown, t=4 was for keydown
// mb is array containing max of mb[0] and mb[1]
// pm_id is optional id of pm 0-5
function eh(t,d,elementtype,elementid,pm_id) {
	
	if (started && !gamepaused) { 
		// onmouseover/onmouseout/onmousedown
		if(t<4) {
			if (mb.length==0 || mb[mb.length-1]!=[t,d]) {
				// onmousedown
				if (t==2) {
					                    last_mousedown=[t,d];
					if ( elementtype != "gu" ) {
						if ((d.substr(0,1) == 'n')&&(d.charAt(1) >= '0')&&(d.charAt(1) <= '5')) {
							mode = 'no';
						}
					}
                    // new, bodge
					else if ( elementtype == 'no' ) {
						mode = 'no';
					}
					// mouseclick
					if ( elementtype=='no' || elementtype=='gu' ) {
						selected(elementtype+elementid, pm_id);
					} else {
						selected('no'+d.substring(2), pm_id);
					}
				}
				// onmouseover/onmouseout
				else { 
					if ( mb[1] ) {
						mb[0]=mb[1];//can probably remove all mb
						mb[1]=[t,d];
					}
                    //else if ( sb[0] ) {
                    else if ( last_mousedown ) {
						mb[1]=[t,d];
					}
					else {
						mb[0]=[t,d];
					}
					
					// mouse move
					if ( t==0 ) {
						//onmouseover
						//if ( (d.substring(0,2)=='no') || (d.substring(0,2)=='gu') ) {
						if ( elementtype=='no' || elementtype=='gu' ) {
							he(d);
						} else {
							hidehighlight();
						}
					}
					else {
                    	//onmouseout
						hidehighlight();
					}
				} 
			}
					}
	} 
}


// new function to handle just keydowns, called on useful onkeydowns
function on_keydown(keycode)
{
	if (started && !gamepaused)
	{
		if ( (keycode>48) && (keycode<58) && (mode!='') ) { 
			var nmt=(keycode-48);
			num(nmt);
		} 
		else if ( (keycode>96) && (keycode<106) && (mode!='') ) { 
			var nmt=(keycode-96); 
			num(nmt);
		}
		else if (keycode==9) { tab() }
		else if (keycode==-9) { shifttab() }
		else if (keycode==37) { left() }
		else if (keycode==39) { right() }
		else if (keycode==38) { up() }
		else if (keycode==40) { down() }
		else if (keycode==8) { del(-1) }
		else if (keycode==46) { del(1) }
		else if (keycode==32) { del(0) }
	}
}


// new, for ipad keypad presses
function ipad_keydown(n) {
	if (started && !gamepaused) {
		if ( (n>=0) && (n<=9) && (mode!='') ) {
			num(n);
		}
		else if (n==-1) {
			del(-1);
		}
	} 
}

function updateTime()
{
	if ( isNaN(timer_time.getUTCSeconds()) )
	{
		d = new Date(); 
		nu = new Date(); 
		timer_time = new Date(nu.getTime()-d.getTime());
	}
	
	if (timer_time.getUTCSeconds()<10) {secs='0'+timer_time.getUTCSeconds()} else {secs=timer_time.getUTCSeconds()}
	if (timer_time.getUTCMinutes()<10) {mins='0'+timer_time.getUTCMinutes()} else {mins=timer_time.getUTCMinutes()}
	if (timer_time.getUTCHours()>0)
	{
		if (timer_time.getUTCHours()<10) {hours='0'+timer_time.getUTCHours()} else {hours=timer_time.getUTCHours()}
	}
	
	if (hours) {
		htmlRef('clock').innerHTML="<span>"+hours+"<span id=\"colon\" class=\"blink_1\">:</span>"+mins+"<"+"/span>";
	} else if (timer_time.getUTCMinutes()) {
		htmlRef('clock').innerHTML="<span>"+mins+"<span id=\"colon\" class=\"blink_1\">:</span>"+secs+"<"+"/span>";
	} else {
		htmlRef('clock').innerHTML="<span>00<span id=\"colon\" class=\"blink_1\">:</span>"+secs+"<"+"/span>";
	}
}

// new function
function assemble_pm_html(square_id, hidden)
{
	var inner_html = '';
	
	// assemble html for all pms
	for (var k=0; k<=5; k++) {
		if ( mouseovers ) {
			//inner_html += pm_html_1+pm_html_2+k+square_id+pm_html_3+k+square_id+pm_html_4+pm_html_5+square_id+pm_html_6a+k+pm_html_6b+k+square_id+pm_html_7;
            if ( eh_in_href )
            {
            	inner_html += pm_html_1_1 + square_id + pm_html_1_2 + square_id + pm_html_1_3 + k + pm_html_1_4 + pm_html_2 + k + square_id + pm_html_3 + k + square_id + pm_html_4 + pm_html_5 + square_id + pm_html_6a + k + pm_html_6b + k + square_id + pm_html_7;
            }
            else
            {
            	inner_html += pm_html_1 + pm_html_2 + k + square_id + pm_html_3 + k + square_id + pm_html_4 + pm_html_5 + square_id + pm_html_6a + k + pm_html_6b + k + square_id + pm_html_7;
            }
        }
		else {
			//inner_html += pm_html_1+pm_html_5+square_id+pm_html_6a+k+pm_html_6b+k+square_id+pm_html_7;
            if ( eh_in_href )
            {
            	inner_html += pm_html_1_1 + square_id + pm_html_1_2 + square_id + pm_html_1_3 + k + pm_html_1_4 + pm_html_5 + square_id + pm_html_6a + k + pm_html_6b + k + square_id + pm_html_7;
            }
            else
            {
            	inner_html += pm_html_1 + pm_html_5 + square_id + pm_html_6a + k + pm_html_6b + k + square_id + pm_html_7;
            }
		}
		
		if ( pm_num[square_id][k]==O || hidden ) {
			inner_html += pmspace;
		}
		else {
			inner_html += pm_num[square_id][k];
		}
		inner_html += pm_html_8;
	}
	
	return inner_html;
}

// new function
function pause()
{
    var innerhtml_string;
	if ( !gamepaused )
	{
		gamepaused=true;
		nu = new Date(); 
		pausedtime=new Date(nu.getTime()-d.getTime());
		var i;
		htmlRef('colon').className='blink_1';
		docRef('grid').backgroundColor=pause_colour;
		for (i=0; i<81; i++)
		{
			htmlRef('bl'+i).className='pause';
			if ( htmlRef('fi'+i) )
			{
				htmlRef('fi'+i).innerHTML='';
			}
		}
		for (i=0; i<lo; i++)
		{
			if ( docRef('no'+i) ) { htmlRef('no'+i).className='notesNumber pause'; }
			if ( docRef('gu'+i) ) { htmlRef('gu'+i).className='pause'; }
			if ( htmlRef('no'+i) ) {
				htmlRef('no'+i).innerHTML='';
			}
			if ( htmlRef('gu'+i) ) {
				htmlRef('gu'+i).innerHTML='';
			}
		}
		if ( htmlRef('play') )
		{
			htmlRef('play').innerHTML='<a href="javascript:pause();"><img name="play" id="pause" src="'+url_prefix+'/images/button-play-small.gif" border="0" onmouseover="this.src=\''+url_prefix+'/images/button-play-small-highlight.gif\'" onmouseout="this.src=\'/'+url_prefix+'images/button-play-small.gif\'" width="14" height="15" title="Play"></a>';
		}
		if ( htmlRef('print_span') )
		{
			htmlRef('print_span').innerHTML = print_span_grey_html;
		}
		if ( htmlRef('save_span') )
		{
			htmlRef('save_span').innerHTML='<img name="save" src="'+url_prefix+'/images/button-save-grey.gif" border="0" title="Cannot save">';
		}
	}
	else
	{
    	var k;
		for (i=0; i<81; i++)
		{
			htmlRef('bl'+i).className='standard';
			if ( docRef('no'+i) )
			{
				if ( bg_shaded[i] ) {
					htmlRef('no'+i).className='notesNumber shaded';
				}
				else {
					htmlRef('no'+i).className='notesNumber standard';
				}
			}
			if ( docRef('gu'+i) )
			{
				if ( bg_shaded[i] ) {
					htmlRef('gu'+i).className='shaded';
				}
				else {
					htmlRef('gu'+i).className='standard';
				}
			}
			if ( htmlRef('fi'+i) )
			{
				if ( given[i] ) {
					htmlRef('fi'+i).innerHTML=given[i];
				}
			}
			if ( htmlRef('no'+i) )
			{
				if ( ed[i]!='' ) {
					// assemble html for all pms
					innerhtml_string = '';
					innerhtml_string = assemble_pm_html(i,true);
					htmlRef('no'+i).innerHTML = innerhtml_string;
				}
				else {
					// assemble html for all pms
					innerhtml_string = '';
					innerhtml_string = assemble_pm_html(i,false);
					htmlRef('no'+i).innerHTML = innerhtml_string;
				}
			}
			if ( htmlRef('gu'+i) )
			{
				if ( ed[i]!='' ) {
                	if ( eh_in_href )
					{
						htmlRef('gu'+i).innerHTML = gu_ahref_1 + i + gu_ahref_2 + i + gu_ahref_3 + '<span class="guess">' + ed[i] + '</span>' + guac;
					}
                	else
					{
						htmlRef('gu'+i).innerHTML = gu_ahref + '<span class="guess">' + ed[i] + '</span>' + guac;
					}
					//htmlRef('gu'+i).innerHTML = guaa+'<span class="guess">' + ed[i] + '</span>'+guac;
				}
				else {
					//htmlRef('gu'+i).innerHTML = guaa + guab + guac;
                	if ( eh_in_href )
					{
						htmlRef('gu'+i).innerHTML = gu_ahref_1 + i + gu_ahref_2 + i + gu_ahref_3 + guab + guac;
					}
                	else
					{
						htmlRef('gu'+i).innerHTML = gu_ahref + guab + guac;
					}
				}
			}
		}
		if ( htmlRef('play') )
		{
			htmlRef('play').innerHTML='<a href="javascript:pause();"><img name="pause" id="pause" src="'+url_prefix+'/images/button-pause-small.gif" border="0" onmouseover="this.src=\''+url_prefix+'/images/button-pause-small-highlight.gif\'" onmouseout="this.src=\''+url_prefix+'/images/button-pause-small.gif\'" width="14" height="15" title="Pause"></a>';
		}
		if ( htmlRef('print_span') )
		{
			htmlRef('print_span').innerHTML = print_span_html;
		}
		if ( htmlRef('save_span') )
		{
			htmlRef('save_span').innerHTML='<a href="javascript:save();"><img name="save" src="'+url_prefix+'/images/button-save.gif" border="0" onmouseover="this.src=\''+url_prefix+'/images/button-save-highlight.gif\'" onmouseout="this.src=\''+url_prefix+'/images/button-save.gif\'" title="Save"></a>';
		}
		gamepaused=false;
		nu = new Date(); 
		d = new Date(nu.getTime()-pausedtime.getTime());
		pb();
	}
		}

// new function
function clear_grid(flash_text)
{
	nu = new Date(); 
	pausedtime=new Date(nu.getTime()-d.getTime());
	gamepaused=true;
	var i;
	htmlRef('colon').className='blink_1';
	for (i=0; i<81; i++)
	{
		if ( htmlRef('fi'+i) )
		{
			htmlRef('fi'+i).innerHTML='';
		}
		if ( htmlRef('no'+i) )
		{
			htmlRef('no'+i).innerHTML='';
		}
		if ( htmlRef('gu'+i) )
		{
			htmlRef('gu'+i).innerHTML='';
		}
		
		if ( bg_shaded[i]==1 )
		{
			htmlRef('no'+i).className='notesNumber standard';
			htmlRef('gu'+i).className='notesNumber standard';
		}
	}
	if ( selected_area )
	{
		i=selected_area.substring(2);
		if ( docRef('no'+i) ) { htmlRef('no'+i).className='notesNumber standard'; }
		if ( docRef('gu'+i) ) { htmlRef('gu'+i).className='standard'; }
	}
	if ( flash_text )
	{
		docRef('flash').top=flash_top + 'px';
		htmlRef('flash').innerHTML='<span>' + flash_text + '</span>';
	}
}


function pb() {
	if ( !gamepaused )
	{
		//timer tick handling
		nu = new Date(); 
		if (timer_time) { old = timer_time.getUTCSeconds();colon_old = Math.floor(timer_time.getUTCMilliseconds()/500); }
		else { colon_old = 0; }
		timer_time = new Date(nu.getTime()-d.getTime()); 
		var sec = timer_time.getUTCSeconds(); 
		colon = Math.floor(timer_time.getUTCMilliseconds()/500);
		if (old!=sec) { updateTime(); }
		if (colon_old!=colon)
		{ 
			if ( colon==0 )
			{
				htmlRef('colon').className='blink_1';
			}
			else
			{
				htmlRef('colon').className='blink_2';
			}
		}
		
		setTimeout("pb()",50);
	}
}

// new function
function get_selection()
{
	var text = '';
	if (window.getSelection)
	{
		text = window.getSelection();
	}
	else if (document.getSelection)
	{
		text = document.getSelection();
	}
	else if (document.selection)
	{
		text = document.selection.createRange().text;
	}
	else return false;
	
	return text;
}

	
function del(d) {
	var l=selected_area.substring(2)-0;// && d!=0
    var innerhtml_string = '';
	var i=0;
	var k=0;
	if (mode=='no') {
		var selected_text=false;
		if ( selected_text )
		{
			var j;
			var moving_numbers;
			var selected_array=selected_text.split('');
			for (j in selected_array)
			{
				moving_numbers=false;
				for (i=0;i<=5;i++)
				{
					if ( pm_num[l][i]==selected_array[j] )
					{
						selnote=i;
						if ( pm_num[l][i]!=O ) { pm--; }
						moving_numbers=true;
					}
					
					if ( moving_numbers )
					{
						if ( pm_num[l][i+1] )
						{
							pm_num[l][i]=pm_num[l][i+1];
						}
						else
						{
							pm_num[l][i]=O;
						}
					}
				}
			}
            if ( need_operafix ) { document.sudoku.operafix.focus(); }
		}
		else
		{
			if ((d==-1)&&(selnote>0)) {selnote--}
			if ( pm_num[l][selnote]!=O ) { pm--; }//alert('Deleting a pencil mark');
			while (((selnote+i)<6)&&(selnote>-1)) {
				if (pm_num[l][selnote+(i+1)]) {
					pm_num[l][selnote+(i++)]=pm_num[l][selnote+i];
				} else {
					pm_num[l][selnote+i]=O;
					i++;
				}
			}
		}
		// assemble html for all pms
		for (k=0; k<=5; k++) {
			innerhtml_string = assemble_pm_html(l, false);
		}
		htmlRef(selected_area).innerHTML = innerhtml_string;
		notesel(selnote);
		if ( pm==0 && m==0 )
		{
			if ( htmlRef('save_span') )
			{
				htmlRef('save_span').innerHTML='<img name="save" src="'+url_prefix+'/images/button-save-grey.gif" border="0" title="Cannot save">';
			}
		}
	}
	else if (mode=='gu') {
		if (ed[l]!='') {--m;ed[l]='';}
		if ( lo==m+1)
		{
			complete=false;
			if ( htmlRef('submit_span') )
			{
				htmlRef('submit_span').innerHTML = submit_span_grey_html;
			}
			else if ( htmlRef('check_span') )
			{
				htmlRef('check_span').innerHTML = check_span_grey_html;
			}
		}
		
		innerhtml_string = assemble_pm_html(l, false);
		htmlRef('no'+l).innerHTML = innerhtml_string;
		if (docRef('no'+l)!=null) {htmlRef('no'+l).className='notesNumber selected';}
		//htmlRef(selected_area).innerHTML = gu_ahref + guab + guac;
        if ( eh_in_href )
        {
            htmlRef(selected_area).innerHTML = gu_ahref_1 + l + gu_ahref_2 + l + gu_ahref_3 + guab + guac;
        }
        else
        {
            htmlRef(selected_area).innerHTML = gu_ahref + guab + guac;
        }
		if (d == -1 && autotab ) shifttab();
		if (d == 1 && autotab ) tab();
		if ( pm==0 && m==0 )
		{
			if ( htmlRef('save_span') )
			{
				htmlRef('save_span').innerHTML='<img name="save" src="'+url_prefix+'/images/button-save-grey.gif" border="0" title="Cannot save">';
			}
		}
	}
}
	
function left() {
	var l = selected_area.substring(2)-0;
	if (mode=='no') { 
		if (selnote) {
			notedsel(selnote);
			if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
			selnote--;
			notesel(selnote)}
		else {
			var tmpx=gl[l][0];
			var tmpy=gl[l][1];
			if (tmpx>0) {
				var otmpx=tmpx;tmpx--;selnote=0;
				while (c[tmpx][tmpy]=='.') {
					if (tmpx<1) {
						rtmp=false;tmpx=otmpx;break}
					tmpx--;
				} 
				if (tmpx!=otmpx) {
					notedsel(selnote);
					if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
					while ((pm_num[l-1][selnote]!=O)&&(selnote<5)) {selnote++}
				}
				eh(2,mode+c[tmpx][tmpy],mode,c[tmpx][tmpy],null);
            }
		}
	}
	else {
		var tmpx=gl[l][0];
		var tmpy=gl[l][1];
		if (tmpx>0)
		{
			var otmpx=tmpx;
			tmpx--;
			while (c[tmpx][tmpy]=='.') {
				if (tmpx<1) {
					tmpx=otmpx;break;
				}
				tmpx--;
			}
			
			if (c[tmpx][tmpy]) {
				eh(2,mode+c[tmpx][tmpy],mode,c[tmpx][tmpy],null);
			}
		}
	}
}

function right() {
	var l = selected_area.substring(2)-0;		
	if (mode=='no') { 
		if ((pm_num[l][selnote]!=O)&&(selnote<5)) {
			notedsel(selnote);
			if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
			selnote++;
			notesel(selnote)}
		else {
			var tmpx=gl[l][0];
			var tmpy=gl[l][1];
			if (tmpx<8) {
				var otmpx=tmpx;tmpx++;
				while (c[tmpx][tmpy]=='.') {
					if (tmpx>7) {tmpx=otmpx;break}tmpx++} 
				if (tmpx!=otmpx) {
					notedsel(selnote);
					if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
					selnote=0}
				rtmp=false;
				eh(2,mode+c[tmpx][tmpy],mode,c[tmpx][tmpy],null) } } }
		else {
			var tmpx=gl[l][0];
			var tmpy=gl[l][1];
			if (tmpx<8) {var otmpx=tmpx;tmpx++;
			while (c[tmpx][tmpy]=='.') {
				if (tmpx>7) {tmpx=otmpx;break}
				tmpx++
			}  
			//if (c[tmpx][tmpy]+1) {
			if (c[tmpx][tmpy]) {
				eh(2,mode+c[tmpx][tmpy],mode,c[tmpx][tmpy],null);
			} 
		}
	}
}

function up() {
	var l = selected_area.substring(2)-0;
	var tmpx=gl[l][0];
	var tmpy=gl[l][1];
	if(mode=='gu') {while ((pm_num[l][selnote]!=O)&&(selnote<5)) {selnote++} eh(2,'no'+(l),'no',(l),null)}
    else {
		while (c[tmpx][tmpy-1]=='.') {tmpy--}
        
        if (c[tmpx][tmpy-1]) {
			eh(2,'gu'+c[tmpx][tmpy-1],'gu',c[tmpx][tmpy-1],null);
		}
	}
}

function down() {
	var l = selected_area.substring(2)-0;
	var tmpx=gl[l][0];
	var tmpy=gl[l][1];
	if(mode=='no') {eh(2,'gu'+(l),'gu',(l),null)}
    else { 
		while ((pm_num[l][selnote]!=O)&&(selnote<5)) {selnote++}
		while (c[tmpx][tmpy+1]=='.') {tmpy++}
		
		if (c[tmpx][tmpy+1]) {
			eh(2,'no'+c[tmpx][tmpy+1],'no',c[tmpx][tmpy+1],null);
		}
	}
}
	
function tab() {
	var l = selected_area.substring(2)-0;
	notedsel(selnote);
	if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
	if (l<(ed.length-1)) eh(2,mode+((l)+1),mode,((l)+1),null);
}

function shifttab() {
	var l = selected_area.substring(2)-0;
	notedsel(selnote);
	if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 6th Feb
	if (l > 0) eh(2,mode+((l)-1),mode,((l)-1),null);
}

// when number key down, stores entered number and adds it to display
function num(nmt) {
	var l=selected_area.substring(2)-0;
	var innerhtml_string = '';
	var k = 0;
	if (mode=='no') {
		if ((nmt!=pm_num[l][0]) && (nmt!=pm_num[l][1]) && (nmt!=pm_num[l][2]) && (nmt!=pm_num[l][3]) && (nmt!=pm_num[l][4]) && (nmt!=pm_num[l][5]) ) {
			if ( pm_num[l][selnote]==O ) { pm++; }
			pm_num[l][selnote] = nmt;
            innerhtml_string = assemble_pm_html(l, false);
			htmlRef(selected_area).innerHTML = innerhtml_string;
			selnote++;
			if (selnote>5) {selnote=5}
			notesel(selnote);
			if ( pm==1 && m==0 ) {
				if ( htmlRef('save_span') )
				{
					htmlRef('save_span').innerHTML='<a href="javascript:save();"><img name="save" src="'+url_prefix+'/images/button-save.gif" border="0" onmouseover="this.src=\''+url_prefix+'/images/button-save-highlight.gif\'" onmouseout="this.src=\''+url_prefix+'/images/button-save.gif\'" title="Save"></a>';
				}
			}
		}
	}
	else if (mode=='gu') {
        innerhtml_string = assemble_pm_html(l, true);
		htmlRef('no'+l).innerHTML = innerhtml_string;
		if (ed[l]=='') { ++m; ed[l]=nmt; }
		else  {ed[l]=nmt; }
        if ( eh_in_href )
        {
			htmlRef(selected_area).innerHTML = gu_ahref_1 + l + gu_ahref_2 + l + gu_ahref_3 + '<span class="guess">' + nmt + '<'+'/span>' + guac;
        }
        else
        {
			htmlRef(selected_area).innerHTML = gu_ahref + '<span class="guess">' + nmt + '<'+'/span>' + guac;
        }
		//htmlRef(selected_area).innerHTML = guaa+'<span class="guess">'+nmt+'<'+'/span>'+guac;
		if ( autotab ) { tab(); }
		if ( pm==0 && m==1 ) {
			if ( htmlRef('save_span') )
			{
				htmlRef('save_span').innerHTML='<a href="javascript:save();"><img name="save" src="'+url_prefix+'/images/button-save.gif" border="0" onmouseover="this.src=\''+url_prefix+'/images/button-save-highlight.gif\'" onmouseout="this.src=\''+url_prefix+'/images/button-save.gif\'" title="Save"></a>';
			}
		}
	}
	if (m==lo) {complete=true; playMOver();}
}

// displays pencil marks in current cell
function notesel(n) {
	if (selected_area) {
		var l = selected_area.substring(2)-0;
		if (docRef('n'+n+l)!=null) {
			htmlRef('n'+n+l).className='noted keycursor';
		}
	}
}

// move focus to pencil marks in new cell
function notedsel(n) {
	if (selected_area) {
		var l = selected_area.substring(2)-0;
		if (docRef('n'+n+l)!=null) {
			htmlRef('n'+n+l).className='noted';
			//if ( need_operafix ) { document.sudoku.operafix.focus(); }// removed 6th Feb
		}
	}
}

// called on mousedown over 'gu', 'no' elements of the grid
function selected(e, pm_id) {
	// e is either 'gu' or 'no' type string
	// selected_area is either 'gu' or 'no' type string
    var innerhtml_string = '';
	var k = 0;
	if (selected_area) {
		// set some class highlights
		var l = selected_area.substring(2)-0;
		if (docRef('no'+l)!=null) {
			if ( bg_shaded[l] ) {
                if ( 'no'+l==selected_area ) { htmlRef('no'+l).className='notesNumber shaded'; }
                else { htmlRef('no'+l).className='notesNumber shaded'; }
			}
			else {
                if ( 'no'+l==selected_area ) { htmlRef('no'+l).className='notesNumber standard'; }
                else { htmlRef('no'+l).className='notesNumber standard'; }
			}
		}
		if (docRef('gu'+l)!=null) {
			if ( bg_shaded[l] ) {
                if ( 'gu'+l==selected_area ) { htmlRef('gu'+l).className='shaded'; }
                else { htmlRef('gu'+l).className='shaded'; }
			}
			else {
                if ( 'gu'+l==selected_area ) { htmlRef('gu'+l).className='standard'; }
                else { htmlRef('gu'+l).className='standard'; }
			}
		} 
	}
    
    // set stuff to select an area
	if (e.substring(0,2)=='gu') {
				notedsel(selnote);
		mode='gu';
		if (docRef(e)!=null) {htmlRef(e).className='selected'; }
		var l = (e.substring(2)-0);
		if (docRef('no'+l)!=null) {
			htmlRef('no'+l).className='selected';
		}
		selected_area = e;
        if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 19th
        //if ( need_operafix ) { document.forms.sudoku.elements.operafix.focus(); }// testing 6th Feb
	}
	else if (e.substring(0,2)=='no') {
		var l = (e.substring(2)-0);
		if ( ed[l]!='' ) {
			innerhtml_string = assemble_pm_html(l, false);
			htmlRef('no'+l).innerHTML = innerhtml_string;
		}
		notedsel(selnote);
		mode='no';
		if (docRef('gu'+l)!=null) {htmlRef('gu'+l).className='mouseover';}
		if (docRef('no'+l)!=null) {htmlRef('no'+l).className='notesNumber selected';}
		selected_area = e;
		if (rtmp) { 
			while ((pm_num[selected_area.substring(2)-0][selnote]==O)&&(selnote>0)) {
				selnote--;
			} 
			while ((pm_num[selected_area.substring(2)-0][selnote]!=O)&&(selnote<5)) {
				selnote++;
							}
		} else { 
			rtmp=true;
		}
		notesel(selnote);
        if ( need_operafix ) { document.sudoku.operafix.focus(); }// added 19th
	} 
}

// called sometimes on mouseover and mouseout
function hidehighlight() {
	// oh is 'gu' or 'no'
	if (oh == '') return;
	var l = oh.substring(2);
	var sb_element = new String(last_mousedown);
	if ( sb_element.substring(4)!=oh.substring(2) )
	{
		if (docRef('no'+l)!=null) blank(l);
		oh = '';
	}
}

// called sometimes on mouseover and mouseout
// for square e...
// sets classNames
function he(e) {
	// e is 'gu' or 'no'
	if (e) {
		var l = oh.substring(2);
		if (selected_area.substring(2)!=l) {
			if (docRef('no'+l)!=null) blank(l);
		}
		if (selected_area.substring(2)!=e.substring(2)) {
			 if (e.substring(0,2)=='no') {
				// set pm area and rest of square to colours for mouseover pm area
				if (docRef(e)!=null) {htmlRef(e).className='notesNumber mouseover';}
				if (docRef('no'+e.substring(2))!=null) {htmlRef('no'+e.substring(2)).className='notesNumber mouseover';}
				if (docRef('gu'+e.substring(2))!=null) {htmlRef('gu'+e.substring(2)).className='lighter_selected';}
			}
            else if (e.substring(0,2)=='gu') {
				// set pm area and rest of square to mouseover colour
                if (docRef(e)!=null) {htmlRef(e).className='mouseover';}
				if (docRef('no'+e.substring(2))!=null) {htmlRef('no'+e.substring(2)).className='notesNumber mouseover';}
			}
			oh = e; 
		} 
	} 
}

// called sometimes on mouseover and mouseout
// sets set pm area and rest of square colour for square number l
function blank(l) {
	 if ( bg_shaded[l] ) {
	 	// set pm area and rest of square to shaded square colour
	 	htmlRef('no'+l).className='notesNumber shaded';
		htmlRef('gu'+l).className='shaded';
	 }
	 else if ( !gamepaused ) {
		// set pm area and rest of square to white
		htmlRef('no'+l).className='notesNumber standard';
		htmlRef('gu'+l).className='standard';
	 }
}
	
var iskeydown=0;

function kl(e){
	if(!e) e = window.event;
    if ( e.target.id === "full_name" || e.target.id === "email")
    {
    	return;
    }
	var res = e.keyCode;
	if(res==9) {
		if (e.shiftKey) res=-9;
	}
	if ((iskeydown == 1) && ((res > 48) && (res < 59))) return false;
	iskeydown = 1;
	on_keydown(res);
	return false 
}

function KeyUp(e){
	iskeydown = 0;
	return false;
}

document.onkeydown = kl;
document.onkeyup = KeyUp;

function pl() {
	if ( saved_sudoku ) {// or gamefrozen
	
	}
	else if (flagreset != true) {
		d = new Date()
	} 		
	else {
		m==lo; complete=true; playMOver();
	}
	
	if ( !gamesolution )
	{
		gamerunning=true;flagreset = false;
        started=true;
		pb();
	}
}
		
function na(a,b,c,d) {}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function ol() {
	MM_preloadImages(url_prefix+'/images/button-back-highlight.gif',url_prefix+'/images/button-check-highlight.gif',url_prefix+'/images/button-help-highlight.gif',url_prefix+'/images/button-pause-small-highlight.gif',url_prefix+'/images/button-play-small-highlight.gif',url_prefix+'/images/button-print-highlight.gif',url_prefix+'/images/button-reset-highlight.gif',url_prefix+'/images/button-restore-highlight.gif',url_prefix+'/images/button-save-highlight.gif',url_prefix+'/images/button-solution-highlight.gif',url_prefix+'/images/button-submit-highlight.gif',url_prefix+'/images/button-play-small.gif',url_prefix+'/images/button-restore.gif',url_prefix+'/images/button-solution.gif',url_prefix+'/images/button-submit.gif',url_prefix+'/images/button-play-small-grey.gif',url_prefix+'/images/button-print-grey.gif',url_prefix+'/images/button-restore-grey.gif');
	//docRef('refref').visibility='hidden';
}

function playMOver() {
	if (unpressed) {
		if(docRef('submit2')!=null) docRef('submit2').cursor = 'default';
	} else if (complete) {
		if(docRef('submit2')!=null) docRef('submit2').cursor = 'pointer';
		if ( htmlRef('submit_span') )
		{
			htmlRef('submit_span').innerHTML = submit_span_html;
			display_submit_message();
		}
		else if ( htmlRef('check_span') )
		{
			htmlRef('check_span').innerHTML = check_span_html;
			display_check_message();
		}
	}
}

// called when HTML page loaded
function playMDown() {
	if (unpressed) {
		pl();
		unpressed=false;
		if ( need_operafix ) { document.sudoku.operafix.focus(); }
	} else if (complete) {
		gamerunning=false;
	}
}


// new function
function create_cookie_string()
{
	var cookie_string =  + "," + '' + ",";
	//alert('cookie_string: ' + cookie_string);
	var cookie_string_2 = '';
	var i;
	var j;
	for (i=0; i<lo; i++)
	{
		if ( ed[i]=='' )
		{
			cookie_string = cookie_string + ".";
		}
		else
		{
			cookie_string = cookie_string + String(ed[i]);
		}
		
		for (j=0; j<6; j++)
		{
			if ( pm_num[i][j]!=O )
			{
				cookie_string_2 = cookie_string_2 + pm_num[i][j];
			}
		}
		cookie_string_2 = cookie_string_2 + ",";
	}
	nu = new Date(); 
	if ( !gamepaused )
	{
		pausedtime=new Date(nu.getTime()-d.getTime());
	}
	var pausedtime_seconds;
	pausedtime_seconds=pausedtime.getTime()/1000;
	cookie_string=cookie_string+','+cookie_string_2+','+pausedtime+','+pausedtime_seconds;
	
	return cookie_string;
}

//new function
function save()
{
	var expire_date = new Date();
	expire_date.setMonth(expire_date.getUTCMonth()+1);
	cookie_string=create_cookie_string();
	if ( cookie_string.search(/\+/)!=-1 )
	{
		//alert('found + in ' + cookie_string);
		cookie_string=cookie_string.replace("+","%2B");
	}
	cookie_string=escape(cookie_string);
	document.cookie = "saved_sudoku="+cookie_string+";expires=" + expire_date.toGMTString() + ";path=/";
	docRef('flash').top=flash_top + 'px';
	htmlRef('flash').innerHTML='<span>Sudoku saved</span>';
	setTimeout("remove_flash()",1000);
	if ( htmlRef('restore_span') )
	{
		htmlRef('restore_span').innerHTML = restore_span_html;
	}
}

//new function, maybe rename?
function session_save(action)
{
	if ( !gamefrozen )//not solution
	{
		cookie_string=create_cookie_string();
		document.sudoku.saved_sudoku_string.value = cookie_string;
	}
	document.sudoku.action.value = action;
	document.sudoku.submit();
}

//new function
function remove_flash()
{
	docRef('flash').top='-30px';
	htmlRef('flash').innerHTML='';
}

//new function
function check_answer(action)
{
	var x_var;
	var y_var;
	var i;
	var j;
	var g_count=0;
	var ed_count=0;
	var sudoku_array=[];
	for (var i=1;i<=9;i++) {sudoku_array[i]=[]}
	var sudoku_string='';
	for (y_var=0; y_var<=6; y_var=y_var+3)
	{
		for (x_var=0; x_var<=6; x_var=x_var+3)
		{
			for (j=y_var+1; j<=y_var+3; j++)
			{
				for (i=x_var+1; i<=x_var+3; i++)
				{
					if ( given[g_count]=='.' )
					{
						sudoku_array[i][j]=String(ed[ed_count]);
						ed_count++;
					}
					else
					{
						sudoku_array[i][j]=String(given[g_count]);
					}
					g_count++;
				}
			}
		}
	}
	for (j=1; j<=9; j++)
	{
		for (i=1; i<=9; i++)
		{
			sudoku_string=sudoku_string + sudoku_array[i][j];
		}
	}
	document.sudoku.solved_sudoku_string.value = sudoku_string;
	document.sudoku.action.value = action;
	
	cookie_string=create_cookie_string();
	document.sudoku.saved_sudoku_string.value = cookie_string;
	document.sudoku.submit();
}

// new function
function reset_confirm()
{
	if ( m>3 || pm>19 ) {
		if ( confirm('Are you sure that you want to reset the current puzzle?') ) {
			clear_grid();
			return true;
		}
		else {
			return false;
		}
	}
	else {
		clear_grid();
		return true;
	}
}

// new function
function return_play()
{
	document.sudoku.action.value = 'play';
	document.sudoku.submit();
}

// new function
function create_print_display()
{
	if ( m==0 && pm==0 && !gamefrozen)
	{
		docRef('clock').display="none";
	}
	window.print();
	if ( m==0 && pm==0 && !gamefrozen )
	{
		setTimeout("remove_print_display()",1000);
	}
}

// new function
function remove_print_display()
{
	docRef('clock').display="block";
}

// new function
function display_check_message()
{
	docRef('flash').top=flash_top + 'px';
	htmlRef('flash').innerHTML='<span>Press Check</span>';
	setTimeout("remove_flash()",1000);
}

// new function
function display_submit_message()
{
	docRef('flash').top=flash_top + 'px';
	htmlRef('flash').innerHTML='<span>Press Submit</span>';
	setTimeout("remove_flash()",1000);
}

// new function
function show_keys() {
	htmlRef('ipad_keys').className='ipad_show';
	htmlRef('ipad_keys_minimised').className='ipad_hide';
}

// new function
function hide_keys() {
	htmlRef('ipad_keys').className='ipad_hide';
	htmlRef('ipad_keys_minimised').className='ipad_show';
}

function ic_thing() {
	if ( document.location.search.match(/preview_mode/i) == null && ( (!window.opener && window.parent.frames.length == 0) || (window.opener && window.opener.parent.frames.length == 0) ) )
	{
        	gamepaused = true;
		document.body.innerHTML = '<div id="direct_view_error"><h1>Oops!</h1><p>Sorry, you cannot view this page directly. Please go to the <a href="http://www.thesundaytimes.co.uk/sto/newsreview/brainpower/">Sunday Times Brain Power</a> page and click on &ldquo;Sudoku&rdquo;.</p><p><a href="http://www.thesundaytimes.co.uk/sto/newsreview/brainpower/" class="button">Continue</a></p></div>';//put back!
	}
}

function un_ic_thing() {
	if ( (!window.opener && window.parent.frames.length == 0) || (window.opener && window.opener.parent.frames.length == 0) )
	{
       
	}
    else
    {
		//setcookie('ic', '', time()-3600, '/', '', FALSE);
		//document.cookie = "saved_sudoku="+cookie_string+";expires=" + expire_date.toGMTString() + ";path=/";
		var expire_date = new Date();
        expire_date.setTime(expire_date.getTime()-3600000);
		document.cookie = "ic="+""+";expires=" + expire_date.toGMTString() + ";path=/";
    }
}

gb('');

// button html
var check_span_html = '<a href="javascript:check_answer(\'check\');" onClick="clear_grid()"><img name="check" id="check" src="'+url_prefix+'/images/button-check.gif" border="0" onMouseOver="this.src=\''+url_prefix+'/images/button-check-highlight.gif\'" onMouseOut="this.src=\''+url_prefix+'/images/button-check.gif\'" title="Check solution"></a>';
var check_span_grey_html = '<img name="check" id="check" src="'+url_prefix+'/images/button-check-grey.gif" border="0" title="Cannot check solution">';
var submit_span_html = '<a href="javascript:check_answer(\'submit\');" onClick="clear_grid()"><img name="submit1" src="'+url_prefix+'/images/button-submit.gif" border="0" onMouseOver="this.src=\''+url_prefix+'/images/button-submit-highlight.gif\'" onMouseOut="this.src=\''+url_prefix+'/images/button-submit.gif\'" title="Submit solution"></a>';
var submit_span_grey_html = '<img name="submit1" src="'+url_prefix+'/images/button-submit-grey.gif" border="0" title="Cannot submit solution">';
var print_span_html = '<a href="javascript:create_print_display();"><img name="print" src="'+url_prefix+'/images/button-print.gif" border="0" onMouseOver="this.src=\''+url_prefix+'/images/button-print-highlight.gif\'" onMouseOut="this.src=\''+url_prefix+'/images/button-print.gif\'" title="Print"></a>';
var print_span_grey_html = '<img name="print" src="'+url_prefix+'/images/button-print-grey.gif" border="0" title="Cannot print">';
var restore_span_html = '<input name="restore" type="image" src="'+url_prefix+'/images/button-restore.gif" border="0" onMouseOver="this.src=\''+url_prefix+'/images/button-restore-highlight.gif\'" onMouseOut="this.src=\''+url_prefix+'/images/button-restore.gif\'" onClick="clear_grid(\'Loading Sudoku...\')" title="Restore">';

// Google Analytics

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