一段JS代码，请大家分析下其中的“时间”“步数”变量是那些？怎么传递给PHP变量！

这是一个从网上找的“拼图”代码。感觉还不错，就把他嵌入了我的PHP主页里面，当一个小应用当然，我希望当游戏成功完成时，能把“时间”“步数”2个变量传递出来，然后输出给用户但是这段JS代码还真看不懂所以来请教大家，其中的“时间”“步数”变量是那些？怎么再传递给PHP变量！<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JS重现_经典拼板游戏</title>
</head>
<body>
<style>
*{margin:0;padding:0;}
.shell{margin:20px auto;position:relative;width:499px;height:299px;border:#666 10px solid;background:#FAFAFA;}
.shell p{position:absolute;width:99px;height:99px;background:url(meitu.jpg) no-repeat 0 0;cursor:pointer;}
.bar{margin:0 auto;width:499px;font:600 16px/1.8em Verdana;}
.bar em{font-style:normal;margin-right:10px;color:#F00;}
#showall{font:12px/1.8em Verdana;cursor:pointer;}
#show{background:url(meitu.jpg) no-repeat 0 0;}
</style>
<div id="shell" class="shell"></div>
<div id="bar" class="bar">
    <b>计时:</b><em id="times">00:00</em>
    <b>步数:</b><em id="steps">0</em>
    <select id="hard">
        <option value="1">入门模式</option>
        <option value="7">简单模式</option>
        <option value="81">一般模式</option>
        <option value="201">困难模式</option>
        <option value="501">超难模式</option>
    </select>
    <b id="showall">查看原图</b>
</div>
<div id="show" class="shell" style="display:none;"></div>
<script type="text/javascript">
speller={
    init:function(n){
        this.hard=n||5;
        this.step=this.useTime=0;
        this.blank=14;
        this.createGrid();
        clearInterval(this.timer);
        this.timer=setInterval(function(){
            speller.useTime++;/* 累加时间并格式化显示 */
            document.getElementById("times").innerHTML=('0'+parseInt(speller.useTime/60)).slice(-2)+':'+('0'+speller.useTime%60).slice(-2);
        },1000);
    }
    ,createGrid:function(){
        var X=function(n){return n%5*100;},Y=function(n){return parseInt(n/5)*100;};
        for(var i=0,html=[];i<15;i++){
            html.push('<p onclick="speller.move(this);" id="'+i+'" class="'+i+'"  style="left:'+X(i)+'px;top:'+Y(i)+'px;background-position:-'+X(i)+'px -'+Y(i)+'px;"></p>');
        }
        document.getElementById("shell").innerHTML=html.join('');
        this.random();
    }
    ,random:function(p){
        var ps=document.getElementById("shell").getElementsByTagName("P"),l=ps.length,me=this;
        ps[this.blank].style.display="none";
        var en=function(n){
            var arr=[];
            if(n<14 && n%5!=4){arr.push(n+1);}
            if(n>0 && n%5!=0){arr.push(n-1);}
            if(n>4){arr.push(n-5);}
            if(n<10){arr.push(n+5);}
            return arr[parseInt(Math.random()*arr.length)]*1;
        }
        var getp=function(n){for(var i=0;i<l;i++){if(ps[i].className==n){return ps[i];}}}
        for(var i=0;i<me.hard;i++){
            this.move2(getp(en(this.blank*1)));
        }
    }
    ,move2:function(p){
        var pos=p.className*1,POS=this.blank*1,abs=Math.abs(pos-POS),max=pos>POS?pos:POS;
        p.style.top=parseInt(POS/5)*100+"px";
        p.style.left=POS%5*100+"px";
        p.className=POS;this.blank=pos;
    }
    ,move:function(p){
        var pos=p.className*1,POS=this.blank*1,abs=Math.abs(pos-POS),max=pos>POS?pos:POS;
        if(abs==5){
            this.fx(parseInt(pos/5)*100,parseInt(POS/5)*100,function(x){p.style.top=x+"px";},function(){},100,.4)
        }else if(abs==1&&max%5!=0){
            this.fx(pos%5*100,POS%5*100,function(x){p.style.left=x+"px";},function(){},100,.4)
        }else{return;}
        p.className=POS;this.blank=pos;document.getElementById("steps").innerHTML=++this.step;
        if(this.check()){
            var me=this,last=document.getElementById("shell").getElementsByTagName("P")[14];
            last.style.display="block";
            this.blank=10000;
            this.fx(0,100,function(x){last.style.opacity=x/100;last.style.filter="alpha(opacity="+x+")";},function(){alert('你真棒!再来一次吧!');me.init();},200,1)
        }
    }
    ,check:function(){
        var p=document.getElementById("shell").getElementsByTagName("P");
        for(var i=0,l=p.length;i<l;i++){if(p[i].className!=p[i].id){return false;}}
        return true;
    }
    ,fx:function(f,t,fn,end,tm,pow){
        var D=Date,d=new D,e,c=tm||240,pow=pow||2;
        return e=setInterval(function (){
            var z=Math.min(1,(new D-d)/c);
            (false===fn(+f+(t-f)*Math.pow(z,pow),z)||z==1) && end && end(clearTimeout(e));
        },10);
    }
}
speller.init(document.getElementById("hard").value);
document.getElementById("showall").onclick=function(){
    document.getElementById("show").style.display=document.getElementById("show").style.display=="none"?"":"none";
}
document.getElementById("hard").onchange=function(){
    speller.init(this.value);
}
document.all&&document.execCommand("BackgroundImageCache", false, true);
</script>
</body>
</html>