<!-- 
//保持宽度不变, 按比例缩放 
//原图片的url 
//页面布局的图片宽度, 图片高度 
//说明: 正常情况下不使用hLayout,　其高度会根据比例自动获取，仅非正常时使用此参数. 
var img=new Image(); 
var retry = 0; 
function getImage(imgUrl, wLayout, hLayout) 
{ 
 retry = 0; 
 //img = new Image(); 
 //img.src = imgUrl; 
 //checkImg(img, wLayout, hLayout);
 document.write("<a href=\"" + imgUrl + "\" target=\"_blank\"><img border=\"0\" src=\"" + imgUrl + "\" height=\"" + hLayout + "\"/></a>");   
} 

function checkImg(imgObj,wLayout, hLayout) 
{ 
 try 
 { 
  if ((imgObj.width != 0) && (imgObj.height != 0)) 
  { 
   var wscale = imgObj.width / wLayout; 
   var hscale = imgObj.height / hLayout;
   
   if(wscale >= hscale)
   {
	   var ww = wLayout; 
	   var hh =  imgObj.height / wscale;
   }
   else
   {
	   var ww = imgObj.width / hscale; 
	   var hh =  hLayout;
   }

   document.write("<a href=\"" + imgObj.src + "\" target=\"_blank\"><img border=\"0\" src=\"" + imgObj.src + "\" width=\"" + ww + "\" height=\"" + hh + "\"/></a>"); 
  } 
  else    
  { 
   retry ++; 
   //if( retry < 10 ) 
   //{ 
   // setTimeout("checkImg(" + imgObj + "," + wLayout + "," + hLayout + ")", 50); 
   //} 
  } 
 } 
 catch(e) 
 { 
  document.write("<img border=\"0\" src=\"" + imgObj.src + "\" width=\"" + wLayout + "\" height=\"" + hLayout + "\"/>"); 
 } 
} 

//调用事例. 在ie6中测试通过 
//getImage("http://image2.sina.com.cn/dy/FocusPic/U48P1T124D1F2633DT20051211163304.jpg", 100, 136); 
//--> 

