// JavaScript Document
window.addEventListener?

window.addEventListener("load",initZoomImages,false):

window.attachEvent("onload",initZoomImages);

 

function initZoomImages(){

var mask=document.body.appendChild(document.createElement("img"));

var timer=null;

//////////

with(mask.style){

position="absolute";

backgroundColor="rgb(198,228,255)";

margin="0px";

padding="0px";

zIndex="999";

}

mask.onmouseout=function(){

if(timer){

clearTimeout(timer);

timer=null;

}

setRect(this,[-100,-100,50,50]);

};

mask.onmouseout();

//////////

for(var i=0,m=document.images;i<m.length;i++){

if(!/^zoom/.test(m[i].getAttribute("rel")))

continue;

m[i].onmouseover=function(){

var scale=this.getAttribute("rel").split("#");

scale=scale.length>1?parseFloat(scale[1]):2;

zoomMask(this,scale,this.getAttribute("urn"));

};

}

//////////

function zoomMask(ele,scale,url){

var ra=getRect(ele),rb=zoomRect(ra,scale);

var d=(rb[3]/ra[3]-1)/10,p=0;

mask.src=url||ele.src;

mask.onmouseout();

(function(){

if(++p<10){

setRect(mask,zoomRect(ra,1+p*d));

timer=setTimeout(arguments.callee,15);

}

else{

setRect(mask,rb);

timer=null;

}

})();

}

function zoomRect(rect,scale){

var r=rect.slice(0,4);

r[0]+=r[2]*(1-scale)*0.5;

r[1]+=r[3]*(1-scale)*0.5;

r[2]*=scale;

r[3]*=scale;

return r;

}

//////////

var _firefox=navigator.userAgent.indexOf("Firefox")>=0;

var _opera=navigator.userAgent.indexOf("Opera")>=0;

var _ie=!_firefox&&!_opera;

//////////

function getRect(obj){

var left=0,top=0;

var width=obj.offsetWidth,height=obj.offsetHeight;

var op=obj,st;

var abs=false;

if(_firefox)

while((op=op.parentNode).tagName!="HTML"){

var st=getComputedStyle(op,null);

if(st.MozBoxSizing!="border-box"){

left+=parseInt(st.borderLeftWidth);

top+=parseInt(st.borderTopWidth);

}

}

while(true){

left+=obj.offsetLeft;

top+=obj.offsetTop;

if(!(op=obj.offsetParent))

break;

if(_ie){

left+=op.clientLeft;

top+=op.clientTop;

if(!abs&&obj.currentStyle.position=="absolute")

abs=true;

}

obj=op;

}

if(_ie){

if(!document.documentElement.clientWidth){

var t=document.body.currentStyle;

var lx=parseInt(t.borderLeftWidth);

var tx=parseInt(t.borderTopWidth);

left-=isNaN(lx)?2:lx;

top-=isNaN(tx)?2:tx;

}

else if(abs){

left-=2;

top-=2;

}

}

return [left,top,width,height];

}

function setRect(obj,rect){

with(obj.style){

left=Math.round(rect[0])+"px";

top=Math.round(rect[1])+"px";

width=Math.round(rect[2])+"px";

height=Math.round(rect[3])+"px";

}

}

}




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