function imageholderclass(){
    this.over=new Array();
    this.down=new Array();
    this.src=new Array();
    this.store=store;
    
    function store(src, down, over){
        var AL=this.src.length;
        this.src[AL]=new Image(); this.src[AL].src=src;
        this.over[AL]=new Image(); this.over[AL].src=over;
        this.down[AL]=new Image(); this.down[AL].src=down;
    }
}
var ih = new imageholderclass();
var mouseisdown=0;
function preloader(t){
    for(i=0;i<t.length;i++){
        if(t[i].getAttribute('srcover')||t[i].getAttribute('srcdown')){
            
            storeimages(t[i]);
            var checker='';
            checker=(t[i].getAttribute('srcover'))?checker+'A':checker+'';
            checker=(t[i].getAttribute('srcdown'))?checker+'B':checker+'';
            
            switch(checker){
            case 'A' : mouseover(t[i]);mouseout(t[i]); break;
            case 'B' : mousedown(t[i]); mouseup2(t[i]); break;
            case 'AB' : mouseover(t[i]);mouseout(t[i]); mousedown(t[i]); mouseup(t[i]); break;
            default : return;            
            }
            
            if(t[i].src){t[i].setAttribute("oldsrc",t[i].src);}
        }
    }
}
function mouseup(t){
    var newmouseup;
    if(t.onmouseup){
        t.oldmouseup=t.onmouseup;
        newmouseup=function(){mouseisdown=0;this.src=this.getAttribute("srcover");this.oldmouseup();}
    }
    else{newmouseup=function(){mouseisdown=0;this.src=this.getAttribute("srcover");}}
    t.onmouseup=newmouseup;
}
function mouseup2(t){
    var newmouseup;
    if(t.onmouseup){
        t.oldmouseup=t.onmouseup;
        newmouseup=function(){mouseisdown=0;this.src=this.getAttribute("oldsrc");this.oldmouseup();}
        }
    else{newmouseup=function(){mouseisdown=0;this.src=this.getAttribute("oldsrc");}}
    t.onmouseup = newmouseup;
}
function mousedown(t){
    var newmousedown;
    if(t.onmousedown){
        t.oldmousedown=t.onmousedown;
        newmousedown=function(){if(mouseisdown==0){this.src=this.getAttribute("srcdown");this.oldmousedown();}}
    }
    else{newmousedown=function(){if(mouseisdown==0){this.src=this.getAttribute("srcdown");}}}
    t.onmousedown=newmousedown;
}
function mouseover(t){
    var newmouseover;
    if(t.onmouseover){
        t.oldmouseover=t.onmouseover;
        newmouseover=function(){this.src=this.getAttribute("srcover");this.oldmouseover();}
    }
    else{newmouseover=function(){this.src=this.getAttribute("srcover");}}
    t.onmouseover=newmouseover;
}
function mouseout(t){
    var newmouseout;
    if(t.onmouseout){
        t.oldmouseout=t.onmouseout;
        newmouseout=function(){this.src=this.getAttribute("oldsrc");this.oldmouseout();}
    }
    else{newmouseout=function(){this.src=this.getAttribute("oldsrc");}}
    t.onmouseout=newmouseout;
}
function storeimages(t){
    var s=(t.getAttribute('src'))?t.getAttribute('src'):'';
    var d=(t.getAttribute('srcdown'))?t.getAttribute('srcdown'):'';
    var o=(t.getAttribute('srcover'))?t.getAttribute('srcover'):'';
    ih.store(s,d,o);
}
function preloadimgsrc(){
    if(!document.getElementById) return;
    var it=document.getElementsByTagName('IMG');
    var it2=document.getElementsByTagName('INPUT');
    preloader(it);
    preloader(it2);
}
if(window.addEventListener){window.addEventListener("load", preloadimgsrc, false);} 
else{
    if(window.attachEvent){window.attachEvent("onload", preloadimgsrc);}
    else{if(document.getElementById){window.onload=preloadimgsrc;}}
}