//var imgT=getElementTop(document.getElementById("img1"));
//var imgL=getElementLeft(document.getElementById("img1"));
//var imgW=parseInt(document.getElementById("img1").width);
//var imgH=parseInt(document.getElementById("img1").height);
//var divW=parseInt(document.getElementById("lens").style.width);
//var divH=parseInt(document.getElementById("lens").style.height);
////alert(document.getElementById("img1").src);
//var mulNum=document.getElementById("img2").width/270;
////alert(mulNum)
var imgT,imgL,imgW,imgH,divW,divH,mulNum;
mulNum=0;
function get_lens()
{      
      if(mulNum==0)
	  {
	   imgT=getElementTop(document.getElementById("img1"));
       imgL=getElementLeft(document.getElementById("img1"));
       imgW=parseInt(document.getElementById("img1").width);
       imgH=parseInt(document.getElementById("img1").height);
       divW=parseInt(document.getElementById("lens").style.width);
       divH=parseInt(document.getElementById("lens").style.height);
	   mulNum=document.getElementById("img2").width/270;
	   //alert(imgT+""+imgL+""+imgW+""+imgH+""+divW+""+divH);
	  }
       var lens=document.getElementById('lens')
      // mulNum=parseFloat(document.getElementById("ipt").value)
       lens.style.visibility='visible';
       lens.style.left=event.clientX+document.body.scrollLeft-divW/2+'px';
       lens.style.top=event.clientY+document.body.scrollTop-divH/2+'px';
	   document.getElementById("img2").style.left=-(event.clientX+document.body.scrollLeft-imgL)*mulNum+divW/2+'px';
       document.getElementById("img2").style.top=-(event.clientY+document.body.scrollTop-imgT)*mulNum+divH/2+'px';
	  // alert(mulNum);
      // var bigimg1=document.getElementById('img2');
     //  bigimg1.width=imgW*mulNum;
      // bigimg1.height=imgH*mulNum;
	  // alert(document.body.scrollTop);
      // bigimg1.style.left=-(event.clientX+document.body.scrollLeft-imgL)*mulNum+divW/2+'px';
     //  bigimg1.style.Top=-(event.clientY+document.body.scrollTop-imgT)*mulNum+divH/2+'px';
	  // alert(bigimg.src);
}

function move_lens(obj)
 {
    var minY=imgT;
    var minX=imgL;
    var maxX=imgL+imgW;
    var maxY=imgT+imgH;
	var eventPageX=event.clientX+document.body.scrollLeft;
	var eventPageY=event.clientY+document.body.scrollTop;
    if((eventPageX>=minX&&eventPageX<=maxX) && (eventPageY>=minY&&eventPageY<=maxY))
     {
       obj.style.left=eventPageX-divW/2+'px';
       obj.style.top=eventPageY-divH/2+'px';
       document.getElementById("img2").style.left=-(eventPageX-imgL)*mulNum+divW/2+'px';
       document.getElementById("img2").style.top=-(eventPageY-imgT)*mulNum+divH/2+'px';
      }
    else document.getElementById("lens").style.visibility='hidden';
    }
	  
  function getElementLeft(obj)
 { 
      var l=0;
     while(obj!=null)
 { 
l=l+obj.offsetLeft;
obj=obj.offsetParent;
}  
return l;
} 
 function getElementTop(obj)
 {
 var h=0;
 while(obj!=null)
 {
 h=h+obj.offsetTop;
 obj=obj.offsetParent; 
 }
 return h;
  }