/* Online Sudoku 2.00.A Beta by (c) 2005 Binny V Abraham (aka BinnyVA)
Website:www.bin-co.com/javascript/sudoku/  www.geocities.com/binnyva */
/// Global Variables ///
var debug=0;var horizondal_line_width=350;var vertical_line_height=370;var default_number_per_box=4;
var repeated_at="";//The ID of location where number was repeated.
var compleated=0; //This will be one when User hits 'I give up' Button
var active_stylesheet="classic-style"; //The used stylesheet
var selected_cell; //The cell that was last clicked on.
//Timer Stuff
var timer_started=0;var timer_clock;var timer_element;var timer_seconds=0;var timer_paused=0;
//Create a 9x9 2 dimentional Array - Cotains all values of all cells
var xy=new Array(9);for(var i=0;i<9;i++) {xy[i]=new Array(9);}
//Create a 9x9 2 dimentional Array - Contains references to all cells
//	- eg. cells[0][0] = $("c11"); etc. :OPTIMIZATION: 
var cells=new Array(9);for(var i=0;i<9;i++) {cells[i]=new Array(9);}
//Base Games
var puzzles=new Array(
"abc.gdefihdeif.hagcbfgh.cibade.bf.iehdcg.ae.acbf.gid.hghdiace.bficgdabhefh.b.f.cg.eaidde.ahfibcg", //15
"a.bfhiec.g.ddcg.fbai.heiehdg.cabfdegi.hc.fabai.cb.df.eghhf.be.agcidbfi.edhgcac.adgf.iheb.g.hebcaf.di", //19
"bfi.edhgcac.adgf.iheb.g.hebcaf.dia.b.fhiec.g.ddcg.fbai.heiehdg.cabfdegi.hc.fabai.cb.df.eghhf.be.agcid", //20
"ib.ad.c.g.efhe.hc.fbiagd.fg.daehcibbhcgd.faiegf.ei.ab.dchdai.hcebfgfgdcai.he.bbeahd.gc.ifih.c.e.bf.gda", //21
"aeh.dfi.cgbcf.b.e.hgiad.gidc.abfeh.fc.g.b.aeihdb.eifdha.gchda.ig.cebfg.bfhd.aeic.dcegi.f.hbaah.ibce.dfg",
"dah.iegfcbbigfd.cehae.fchab.gi.dbh.fe.gacidcedi.bhgaf.ag.i.d.cfbh.egb.ch.dea.f.ihf.e.aci.d.gbid.a.fbgceh",
"cf.b.ag.eidhhd.eif.cbaga.g.ibdh.fceg.acb.ifhe.d.dehgcafb.i.ifbe.hdg.acdc.iebg.f.haegf.ahd.cibhba.ci.f.deg",
"chfgeai.d.be.gdib.hcf.ab.iacf.dh.gefa.d.hcg.ebigic.bd.eahfeb.hfa.i.gdcd.gh.bica.fe.fei.hagd.cb.a.cbdefihg",
"adbfheig.c.icfba.gdeh.he.gcidfa.bcb.ide.ah.fgag.dh.fbei.cefhigcbd.abi.he.cd.gafg.de.fbach.i.acf.g.hid.b.e",
"ied.a.bfghchcfgeia.b.dagbh.cdi.efb.ied.ca.f.ghcga.ef.hdib.fd.hbig.cae.hdie.fg.cabb.a.e.ihcf.dggfcd.b.aehi",
"h.g.bc.ea.idfa.ci.bf.dgehfe.dih.gcbab.fi.ehg.acdh.dcfabi.geag.edc.ib.fhdah.gbe.ficebf.ci.ad.hggi.ch.df.e.ab",
".e.cadbhfgi.fbhegiad.cg.di.afch.bei.h.fba.g.cd.e.badhceif.g.ec.g.dif.b.hag.ibhe.da.fc.chagifde.bfedcabi.g.h",
"ge.c.h.i.fdabaif.bg.d.echdh.bae.cf.gic.he.fbdig.a.dbageifh.c.ifgca.hb.deb.dh.efg.acicf.e.ia.bhdggia.h.c.d.ebf",
"deb.cg.a.ihff.ah.dbi.egccgi.h.fe.bda.gcdf.bihae.a.fb.hd.ec.i.geihg.acfb.dbi.ca.d.hefgge.dbc.fi.haah.f.ie.gdcb"
);
var chosen=0;var this_puzzle=""; //currently played game's fingerprint
var orginal_game=""; //current puzzle
/// Cookie Functions ///
var sudoku_fingerprint=getCookie("sudoku_fingerprint"); // retrieve all values
if (sudoku_fingerprint==null||sudoku_fingerprint=="") sudoku_fingerprint=""; //or define default values
function getCookie(name) {var start=document.cookie.indexOf(name+"=");var len=start+name.length+1;if ((!start)&&(name !=document.cookie.substring(0,name.length))) {return null;}
if (start==-1) return null;var end= document.cookie.indexOf(";",len);if (end==-1) end=document.cookie.length;
return unescape(document.cookie.substring(len, end ));}
function setCookie(name,value) {var today=new Date();today.setTime(today.getTime());var expires=28;expires=expires *1000*60*60*24;var expires_date=new Date( today.getTime()+(expires));document.cookie=name+"="+escape(value)+((expires) ? ";expires="+expires_date.toGMTString() : "" )}
/// Non Game Functions ///
//Changes style sheet that is in use.
function selectStyleSheet() {$(active_stylesheet).disabled=true;active_stylesheet=$("style-selector").value;$(active_stylesheet).disabled=false;}
function $(id) { return document.getElementById(id); }
function addEvent(elm,evType,fn) {if (elm.addEventListener) {elm.addEventListener(evType,fn, false);return true;}
else if (elm.attachEvent) {var r=elm.attachEvent('on'+evType,fn);return r;}
else {elm['on'+evType]=fn;}}
function removeEvent(elm, evType,fn) {if (elm.removeEventListener) {elm.removeEventListener(evType,fn, false);return true;}
else if (elm.detachEvent) {var r=elm.detachEvent('on'+evType,fn);return r;}
else {elm['on'+evType] ='';}}
//Returns target of event.
function findTarget(e) {var element;if (!e) var e=window.event;if (e.target) element=e.target;else if (e.srcElement) element=e.srcElement;
if (element.nodeType==3) element=element.parentNode;// defeat Safari bug
return element;}
/// Colour Functions ///
//Convert a hex value to its decimal value - inputed hex must be in
//	format of a hex triplet - kind we use for HTML colours. The function
//	will return an array with three values.
function hex2num(hex) {if(hex.charAt(0)=="#") {hex=hex.slice(1);}
hex = hex.toUpperCase();var hex_alphabets="0123456789ABCDEF";var value=new Array(3);var k=0;var int1,int2;for(var i=0;i<6;i+=2) {int1=hex_alphabets.indexOf(hex.charAt(i));int2=hex_alphabets.indexOf(hex.charAt(i+1));value[k]=(int1*16)+int2;k++;}
return(value);}
//Give a array with three values as argument and function will return
//	the corresponding hex triplet.
function num2hex(triplet) {var hex_alphabets="0123456789ABCDEF";var hex="#";var int1,int2;for(var i=0;i<3;i++) {int1=triplet[i]/16;int2=triplet[i]%16;hex +=hex_alphabets.charAt(int1)+hex_alphabets.charAt(int2);}
return(hex);}
function fadeColor(id,start_hex,stop_hex,difference,delay,color_background) {//Default values...
if(!difference) difference=20;if(!delay) delay=100;if(!start_hex) start_hex="#FFFFFF";if(!stop_hex) stop_hex="#000000";if(!color_background) color_background="c";var ele=document.getElementById(id);if(!ele) return;var start= hex2num(start_hex);var stop=hex2num(stop_hex);
//Make it numbers rather than strings.
for(var i=0;i<3;i++) {start[i]=Number(start[i]);stop[i]=Number(stop[i]);}
//Morph one colour to other. If start color is greater than stop colour, start color will
//	be decremented till it reaches stop color. If it is lower, it will incremented.
for(var i=0;i<3;i++) {if (start[i]<stop[i]) {start[i] +=difference;if(start[i]>stop[i]) start[i]=stop[i];//If we have overshot our target, make it equal - or it won't stop.
} else if(start[i]>stop[i]) {start[i]-=difference;if(start[i]<stop[i]) start[i]=stop[i];}}
//Change color(or background color).
var color="rgb("+start[0]+","+start[1]+","+start[2]+")";if(color_background=="b") {ele.style.backgroundColor=color;} 
else {ele.style.color = color;}
//Stop if we have reached target.
if((start[0]==stop[0])&&(start[1]==stop[1])&&(start[2]==stop[2])) return;start_hex=num2hex(start);
//Keep calling this function
window.setTimeout("fadeColor('"+id+"','"+start_hex+"','"+stop_hex+"',"+difference+","+delay+",'"+color_background+"')",delay);}
/// Co-Ordinates Functions ///
//Get index from given two x and y co-ordinates and return it.
//Takes 2 and 3 and returns 6.
function getIndex(x,y) {var index=(y*3)+x-3;return index;}
//Returns x and y co-ordinates based on index given as argument.
//Takes 6 and returns 2 and 3 as an array
function getXY(index) {var x=1,y=1;	switch (index) {case 1:y=1;x=1;break;
case 2: y=1;x=2;break;
case 3: y=1;x=3;break;
case 4: y=2;x=1;break;
case 5: y=2;x=2;break;
case 6: y=2;x=3;break;
case 7: y=3;x=1;break;
case 8: y=3;x=2;break;
case 9: y=3;x=3;break;}
return Array(x,y);}
/// Random Number Genarators ///
//Returns a random number between 1 and 9(inclusive)
function rand() {var number=Math.round(Math.random()*10);while (number<1||number>9) {//If number is 0 or 10, get another number.
number = Math.round(Math.random()*10);}
return number;}
//Returns a random number(1-9) that is not in list given as argument
function uniqueRand(list) {var number=rand();for(var a=0;a<list.length;a++) {if(list[a]==number) { //If random number was found in list,
number=rand(); //get a new number,
a=-1; //and start over again.
}} return number;}
/// GUI Functions ///
//Display given data in said colour 
function show(data,color) {document.getElementById("display_area").innerHTML=data+"<br />\n";document.getElementById("display_area").style.color=color;}
//Display Vertical help line
function helpLineV(line) {var item=document.getElementById("lv-"+line).style;if(item.position=="absolute") {item.position="relative";item.height="10px";} else {item.position="absolute";item.height=vertical_line_height+"px";}}
//Display Horizondal Help line
function helpLineH(line) {var item=document.getElementById("lh-"+line).style;if(item.position=="absolute") {item.position="relative";item.width="5px";} else {item.position="absolute";item.width=horizondal_line_width+"px";}}
//See if box and box that should be checked is horizondal to each other.
function isHorizondal(box,check_in) {if((box==1||box==2||box==3)&(check_in==1||check_in==2||check_in==3)) return true;if((box==4||box==5||box==6)&(check_in==4||check_in==5||check_in==6)) return true;if((box==7||box==8||box==9)&(check_in==7||check_in==8||check_in==9)) return true;return false;}
//See if box and box that should be checked is verical to each other.
function isVertical(box,check_in) {if((box==1||box==4||box==7)&(check_in==1||check_in==4||check_in==7)) return true;if((box==2||box==5||box==8)&(check_in==2||check_in==5||check_in==8)) return true;if((box==3||box==6||box==9)&(check_in==3||check_in==6||check_in==9)) return true;return false;}
//Returns false if 'number' given as argument appears anywhere in previous row or column.
//Full_Check is done if it is called from hinting system - then all cells must be
//checked instead of just ones before current cell. 
function checkForUnique(box,cell,full_check) {box ++;cell++;var number=cells[box-1][cell-1].value;
//There is nothing before 1, so we don't have to check it - unless we are doing a full check.
if(box>1||full_check) {
//All boxes we will have to check for duplicates for this box
//If it is NOT a full search, we just need to check boxes directly above or left of this box.
var boxes_to_check=new Array();switch (box) {case 1 : if(full_check) {boxes_to_check.push(2,3,4,7);}
break;
case 2 : boxes_to_check.push(1);if(full_check) {boxes_to_check.push(3,5,8);}
break;
case 3 : boxes_to_check.push(1,2);if(full_check) {boxes_to_check.push(6,9);}
break;
case 4 : boxes_to_check.push(1);if(full_check) {boxes_to_check.push(5,6,7);}
break;
case 5 : boxes_to_check.push(2,4);if(full_check) {boxes_to_check.push(6,8);}
break;
case 6 : boxes_to_check.push(3,4,5);if(full_check) {boxes_to_check.push(9);}
break;
case 7 : boxes_to_check.push(1,4);if(full_check) {boxes_to_check.push(8,9);}
 break;
case 8 : boxes_to_check.push(2,5,7);if(full_check) {boxes_to_check.push(9);}
break;
case 9 : boxes_to_check.push(3,6,7,8);break;}
var value="",xy_coods,cell_to_check; next_box:
for(var i=0;i<boxes_to_check.length;i++) {xy_coods=getXY(cell);var check_box=boxes_to_check[i];for(var j=1;j<=3;j++) {
//Horizondal Checks
if(isHorizondal(box,check_box)) {
//Non-full checks will check only cells before them - will not check all cells. 
if(!full_check) {if(box==1||box==4||box==7) continue next_box;else if(box==5&&check_box==6) continue next_box;else if(box==8&&check_box==9) continue next_box;}
//Check data for redundency here.
cell_to_check=getIndex(j,xy_coods[1]);value=cells[(check_box-1)][cell_to_check-1].value;if(value == number) {
repeated_at="c" + check_box + cell_to_check;//Get id of cells that matched
return false; //There is number repeatation - return with error.
}
//Verical Checks
} else {if(!full_check) {if(box<4) continue;else if(box==4&&check_box==7) continue next_box;else if(box==5&&check_box==8) continue next_box;else if(box==6 && check_box==9) continue next_box;}
//Check data for redundency here.
cell_to_check=getIndex(xy_coods[0],j);value=cells[check_box-1][cell_to_check-1].value;if(value==number) {repeated_at="c"+check_box+cell_to_check;//Get id of cells that matched
return false; //There is number repeatation - return with error.
}}}}}
//Check within box
for(var k=0;k<9;k++) {var val=cells[box-1][k].value;if(number==val&&(k+1 !=cell)) { //If nubmer is found at some other cell
repeated_at="c"+box+(k+1);return false;}}
return true;}
//Insert value given as 'value' argument into entry by id of 'id'
function insert(id,value) {var ele=document.getElementById(id); ele.style.color="";ele.value=value
if(value)
ele.disabled=true; //Make it uneditable
else 
ele.disabled=false; //Make fomerly uneditable cells editable
}
//Clear all fields - and enable all disabled cells
function clearer() { var id = ""
document.f.reset(); //Clear fields
for(var i=0;i<9;i++) {
for(var j=0;j<9;j++) {cells[i][j].disabled = false;}}}
//Change background color of cells to white
function discolorCells(cell1,cell2) {document.getElementById(cell1).style.background = "#fff";if(cell2) document.getElementById(cell2).style.background = "#fff";}
//Records values of all box and cells by coping all values to 'xy' array.
function recordPosition() {var value=0;for(var a=0;a<9;a++) {for(var b=0;b<9;b++) {value=cells[a][b].value;if(!isNaN(value)&&value.length==1) {
xy[a][b]=value;} else { xy[a][b]=0;}}}}
//Convert current position to a string that we can save and use latter on. This function will create a 
//finger print for this game and will save that as a Cookie. The finger print will have two types of data...
//Number(1-9) - The number for that cell. If number is 3, a 3 digit will be entered there.
//Aphabet(a-z)- The number of empty cells that must be left before next number is inserted.
//Argument : Action - 1 = Record game to a database. 
//- 0 = Just get fingerprint of game and return it 
function pos2str(action) {var str="";var zero_count=0;var alpha=" abcdefghijklmnopqrstuvwxyz";if(action) {recordPosition(); //Get position in array
} for(var a=0;a<9;a++) {for(var b=0;b<9;b++) {if(xy[a][b]) {if(zero_count) {str +=alpha.charAt(zero_count); //Include number of continous zeros - a means 1 zero, b means 2 etc.
zero_count=0;}
str += xy[a][b];} else {zero_count++; //Count empty places
}}} return str;}
//Convert given string to a position that can be displayed on board 
//Argument : str 	- FINGERPRINT = Use this fingerprint to create game. 
function str2pos(str) {var zero_flag=0;var alpha="abcdefghijklmnopqrstuvwxyz";var pos=0;
//The id of current cell will be calculated form these varabales. 
var a=0;var b=0;str=str.replace(/\./g,"");while(a<9) {ch=str.charAt(pos);id="c"+(a+1)+(b+1);if(!isNaN(ch) && !zero_flag) {insert(id,ch);} else if(zero_flag) {insert(id,"");zero_flag--;} else {insert(id,"");zero_flag=alpha.indexOf(ch);}
//Get next number if zero flag is not up
if(!zero_flag) {pos++;}
//Update positions
b++;if(b>=9) {b=0;a++;}}}
//Create a string we will put into cookie - a little different for pos2str()
//- This format will have values of all cells sperated by a ';' char. The provided 
//numbers will be prefixed with a dot like - '.5'
function makeCookieString() {var str="";var puzzle_cells=new Array(0);for(var a=0;a<9;a++) {for(var b=0;b<9;b++) {value=cells[a][b].value;if(cells[a][b].disabled) {value = "."+value;}
puzzle_cells.push(value);}}
str = puzzle_cells.join(';');return str;}
//This function is called when user changes value of a cell.
//:EVENT: called by onchange Event 
function checkCell(e) {var cell=findTarget(e);var val=cell.value;if(val<1||val>9||isNaN(val)) { //Some error in this cell
tagProblemCell(cell,1);if(val.length >1) { //If mulitple numbers are given, make font smaller.
cell.className+= " possibilities-entry";}
return 0;} else {if(cell.className.indexOf("possibilities-entry")) { //Make font bigger if it was small.
cell.className = cell.className.replace(/ possibilities\-entry/g,"");cell.className=cell.className.replace(/ problem\-cell/g,"");cell.style.color="#000";}
if($("live-hints").checked) {var id=cell.id;var a=Number(id.charAt(1))-1;var b=Number(id.charAt(2))-1;
if(!checkForUnique(a,b,true)) {cell.style.background="red"; //Repated number found here.
$(repeated_at).style.background="red"; //and here.
setTimeout("discolorCells('"+repeated_at+"','"+id+"')",2000);//Change background back to white after 2 secs
//setTimeout("makeProblemCell('"+id+"')",2000);
return 0;}}}
tagProblemCell(cell,0);return 1;}
function makeProblemCell(id) {$(id).className +=" problem-cell";}
//Tags given cell as having problem or not.
function tagProblemCell(cell,on) {var current_classes=cell.className.toString();var have_problem=0;if(current_classes.indexOf("problem-cell")>=0) have_problem=1;if(on) {if(!have_problem) cell.className +=" problem-cell";} else {if(have_problem) cell.className=current_classes.replace(" problem-cell","");}}
/// Functions Called from GUI ///
//Save Cookie Format string created with makeCookieString() function to a cookie
function save() {var str = makeCookieString();setCookie("sudoku_fingerprint",str);alert("Game saved.");}
//Load game from cookie string
function load() {
//Clear previous data
clearer();
//Get game fingerprint from Cookie.
var str = getCookie("sudoku_fingerprint");if(str==""||str==null) {
alert("Ne trouve aucun jeu sauvegardé!")
return false;}
compleated=0;var index=0;var puzzle_cells=str.split(";");for(var a=0;a<9;a++) {
for(var b=0;b<9;b++) {number = puzzle_cells[index];if(number.charAt(0)==".") {//If there is a '.' char, it ia a provided number
number=number.charAt(1);cells[a][b].disabled=true;}
cells[a][b].value=number;index++;}}}
/// Timer Functions ///
//Show timer for game.
function timer() {if(!timer_seconds) timer_seconds=0;timer_seconds++;var secs=timer_seconds%60;var mins=Math.floor(timer_seconds/60);if(secs<10) secs="0"+secs;if(mins<10) mins="0"+mins;timer_element.innerHTML=mins+":"+secs;timer_clock=window.setTimeout("timer()",1000);}
//Stop timer
function stopTimer() {if(timer_clock) clearTimeout(timer_clock);}
//This will pause timer if it is not paused, and will up-pause it if it was paused.
function toggleTimer() {if(!timer_paused) {//Stop Time
clearTimeout(timer_clock);timer_element.style.color="#f00";$("timer_control").value="Continue";timer_paused=1;
//Make users unable to edit puzzle in pause mode.
var edit_mask = $("pause-hider");edit_mask.style.display="block";
//Find Time...
if(!timer_seconds) timer_seconds=0;var secs=timer_seconds%60;var mins=Math.floor(timer_seconds/60);if(secs<10) secs="0"+secs;if(mins<10) mins="0"+mins;  
//Make text in Edit Mask.
edit_mask.innerHTML = "<br /><strong>Jeu mis en pause après  "+mins+":"+secs+"</strong><br /><br />" +
"<a onclick='toggleTimer()' style='cursor:hand;'>Cliquez ici pour continuer ...</a>";
} else { //UnPause clock
$("timer_control").value="Pause";timer_element.style.color="#000";timer_paused=0;timer();
//Remove edit mask
var edit_mask = $("pause-hider");edit_mask.style.display="none";}}
//Check all Rows/Cols for a repeated number
function checker() {var found=0;show("Vérification du jeu ...","#a84efa");
loop:
for(var a=0;a<9;a++) {for(var b=0;b<9;b++) {var ele=cells[a][b];var id="c"+(a+1)+(b+1);var value=ele.value
if(isNaN(value)||value<1||value>9) {if(value=="") {show("Cellules vides trouvées.","#d78601");
} else {show("Entrées invalides trouvées.","#d78601");}
found=1; ele.style.background="red"; //Problem Cells found here.
setTimeout("discolorCells('"+id+"')",2000);break loop;}
else if(value) {if(!checkForUnique(a,b,false)) {ele.style.background="red"; //Repated number found here.
document.getElementById(repeated_at).style.background="red"; //and here.
show("Repeated numbers were found.","#d78601");setTimeout("discolorCells('"+repeated_at+"','"+id+"')",2000);//Change background back to white after 2 secs
found++;break loop;}
} else {show("Cellules vides trouvées. Veuillez complèter le puzzle.","#d78601");ele.style.background = "red"; //Empty
setTimeout("discolorCells('"+id+"')",2000);found=1;break loop;}}}
if(!found) { if(compleated)
alert("Désolé - vous ne pouvez pas gagner après l'abandon. Mais il est résolu."); else
alert("Félicitations - Vous avez complété le sudoku.");stopTimer();show("Game Over","#000000");}}
//Clear all unwanted cells.
function reloadGame() {str2pos(orginal_game); //Use that to rebuild game
} //Solve game
function solve() {
show("Recherche de la solution du jeu ...");
if(confirm("Cela fera automatiquement résoudre la grille pour vous.\nÊtes-vous sûr que vous voulez le faire?\n")) {
str2pos(this_puzzle);compleated=1;show("Puzzle résolu.");stopTimer();}}
//This is called when 'How am I doing' Button is clicked. Sees if any repetition is made
//and reports back to user how many more cells must be filled.
function checkStatus() {var invalid_cells=0;var empty_cells=0;for(var a=0;a<9;a++) {for(var b=0;b<9;b++) {var ele=cells[a][b];var value=ele.value
//Find Invalid cells. 
if(isNaN(value)||value<1||value>9) {if(value=="") {empty_cells ++;} else {invalid_cells ++;}}
//Valid items.
else if(value) {if(!checkForUnique(a,b,true)) {ele.style.background = "red"; //Repated number found here.
var id="c" +(a+1)+(b+1);$(repeated_at).style.background="red"; //and here.
setTimeout("discolorCells('"+repeated_at+"','"+id+"')",2000);//Change background back to white after 2 secs
return;}
} else {empty_cells ++;}}}
//Show results on screen
show("Vous faites bien jusqu'ici. Mais vous avez encore "+(invalid_cells+empty_cells)+" autres cellules à remplir.","#006600");
fadeColor("display_area","#ffff00","#ffffff",30,100,"b");}
/// Pen Based Gaming ///
var pen_selected_digit=1;
//A cell was clicked - just inserted selected number into it.
//:EVENT: Called on onclick event after pen is picked
function putSelectedDigit(e) {var cell=findTarget(e);cell.value=pen_selected_digit;checkCell();cell.blur();}
//Watch keypresses - if it is a 1-9 digit, use that number as pen picked number
//:EVENT: called on onkeypress event.
function monitorKeyboard(e) {if (!e) var e=window.event;if (e.keyCode) code=e.keyCode;else if (e.which) code=e.which;var character=String.fromCharCode(code);//If pressed key IS a number
if(!isNaN(character)) {var number=Number(character);if(number) pickPenDigit(number);}}
//Pick up pen. Now when user clicks on a cell chosen digit will be inserted there.
function pickPen() { for(var i=0;i<9;i++) {for(var j=0;j<9;j++) {var this_cell=cells[i][j];if(this_cell.className.indexOf("pen-picked")==-1) this_cell.className+= " pen-picked";//Change cursor
addEvent(this_cell,"click",putSelectedDigit); //Attach a click event to all cells 
}}
addEvent(document,"keypress",monitorKeyboard);$("pen-picks").style.display="inline";}
//Drop pen - restore manual editing capability. 
function downPen() {for(var i=0;i<9;i++) {for(var j=0;j<9;j++) {var this_cell=cells[i][j];if(this_cell.className) {var classes=this_cell.className.toString();this_cell.className=classes.replace(/pen\-picked/g,"");}
removeEvent(this_cell,"click",putSelectedDigit);}}
removeEvent(document,"keypress",monitorKeyboard);$("pen-picks").style.display="none";}
//If user clicks on any rumber in keypad, make it pen digit.
function pickPenDigit(number) {pen_selected_digit=number;$("selected-pen-number").firstChild.nodeValue=number;}
/// Cheats ///
//:EVENT: Happens on onclick event for all cells at all times.
function cellClicked(e) {selected_cell=findTarget(e);}
//Show number of selected cell.
function revealCell() {if(!selected_cell) return;var str=this_puzzle.replace(/\./g,"");//Remove '.' in active puzzle.
var c_xy=selected_cell.id.split(""); //The id will be split - if id is 'c13' resulting array will be c,1,3
var box=c_xy[1]-1;var cell=c_xy[2]-1;var rest=str.substr(box*9);//Remove numbers of all boxes before it.
var number= rest.charAt(cell); //Now get cell.
selected_cell.value=number;fadeColor(selected_cell.id,"#ffffff","#000000",10,100,"c");}
//This will make new puzzles but replacing all numbers in a base game with other numbers - in effect creating
//a entirely new game. This function is sneaky - Big Time
function makeNewOrder(str) {
//Inits
var alpha=" abcdefghijklmnopqrstuvwxyz";var new_order="";
//Get random numbers for all alphas - and store it in a array.
numbers=new Array("0");for(j=0;j<9;j++) {new_numbers=uniqueRand(numbers); //Give random position for numbers
numbers.push(new_numbers);}
//Now change all alphas back to numbers - with new digits
for(i=0;i<str.length;i++) {if(str.charAt(i)=="."||str.charAt(i)=="*"||str.charAt(i)=="x"||str.charAt(i)=="_"||str.charAt(i)=="-"||str.charAt(i)=="+") { //It is a special char
new_order += "."
} else {new_order += numbers[alpha.indexOf(str.charAt(i))] }}
return new_order;}//Creates puzzle
function newGame() {chosen=Math.floor((Math.random()*10)/(10/puzzles.length)); //'chosen' puzzle should be random
this_puzzle=makeNewOrder(puzzles[chosen]);
show("");//Clear display area.
//Clear existing numbers first
compleated=0;clearer();var last_box_ended_at=0;var extra_number_count=0;default_number_per_box=$("difficulty").value;for(var i=0;i<9;i++) { //Initialisations
var b=0,location_of_fixed_number=0;var arr_b=new Array();
//Get numbers for this box from 'this_puzzle' varaible
var limit=9;var this_box="";var dot_count=0;for(var j=last_box_ended_at; j<last_box_ended_at+limit; j++) {if(this_puzzle.charAt(j)==".") {limit++;dot_count++;}
this_box = this_box + this_puzzle.charAt(j);}
last_box_ended_at=last_box_ended_at + limit;
//Decide how much numbers must appear in this box
number_of_numbers=default_number_per_box - extra_number_count;extra_number_count=0;
// 'extra_number_count' is used for reducing number of populated cells in next box if 
//the current box has more than 4 numbers.
//If number of dots are more than 4, use it
if (dot_count>number_of_numbers) {if(rand()>5) {extra_number_count=dot_count-number_of_numbers;} 
number_of_numbers=dot_count;}//Empty array.
arr_b=new Array();
//Get positions in box and insert numbers there
for(b=0;b<number_of_numbers;b++) {location_of_fixed_number=this_box.indexOf(".");if(location_of_fixed_number + 1) {//If there are dots...
//Remove this dot
this_box=this_box.substring(0,location_of_fixed_number)+this_box.substring(location_of_fixed_number+1,this_box.length);
} else { //No more dots - get some random locations
location_of_fixed_number=uniqueRand(arr_b); //Give random position for numbers
location_of_fixed_number--;//uniqueRand gives 1-9. We need it from 0
}
arr_b.push(location_of_fixed_number+1);//Put number into don't repeat array
//Get numbers that should be inserted
insertion_number = this_box.charAt(location_of_fixed_number);location_of_fixed_number++;//We need this to start from 1 - not from 0
id = "c" + (i+1) + location_of_fixed_number
insert(id,insertion_number); //Show numbers
}}
orginal_game = pos2str(2);//Save game before beginning - for restarting puzzle
//Initialize timer.
stopTimer();timer_seconds=0;$("timer").innerHTML="00:00";//Start timer
timer();timer_started=1;}
function init() {//First get references of all cells
var cell_ref;for(var i=1;i<=9;i++) {for(var j=1;j<=9;j++) {cell_ref=document.getElementById("c"+i+j);addEvent(cell_ref,"change",checkCell);//Call checkCell() function when user changes value of a cell.
addEvent(cell_ref,"click",cellClicked);cells[i-1][j-1]=cell_ref;// :OPTIMIZATION:
}}//Load last selected stylesheet.
var new_style_sheet = getCookie("sudoku_options_stylesheet");if($(new_style_sheet)) {$(active_stylesheet).disabled=true;active_stylesheet = new_style_sheet;$(active_stylesheet).disabled=false;$("style-selector").value = new_style_sheet;}
var hinting = getCookie("sudoku_options_live_hint");if(hinting) {$("live-hints").checked = hinting; }
timer_element = $("timer");newGame();}
//Saves chosen options when user leaves page.
function exit() {setCookie("sudoku_options_stylesheet",active_stylesheet);if($("live-hints").checked) {setCookie("sudoku_options_live_hint",true);} else {setCookie("sudoku_options_live_hint",false);}}
window.onload=init; window.onunload=exit;