// JavaScript Document
<!-- 
//图片按比例缩放 
var flag=false; 
function DrawImage(ImgD,iw,ih){ 
 var image=new Image();
  var iwidth,iheight;
 if (typeof(iw)=="number"){
 	iwidth = iw;
 }else{
 	iwidth = 100;  //定义允许图片宽度 
 }
  if (typeof(ih)=="number"){
 	iheight = ih;
 }else{
 	iheight = 100;  //定义允许图片宽度 
 }
 //var iwidth = 100;  //定义允许图片宽度 
 //var iheight = 100;  //定义允许图片高度 
 image.src=ImgD.src; 
 if(image.width>0 && image.height>0){ 
 flag=true; 
 if(image.width/image.height>= iwidth/iheight){ 
  if(image.width>iwidth){   
  ImgD.width=iwidth; 
  ImgD.height=(image.height*iwidth)/image.width; 
  }else{ 
  ImgD.width=image.width;   
  ImgD.height=image.height; 
  } 
  //ImgD.alt=ImgD.alt+"图片尺寸："+image.width+"×"+image.height; 
  } 
 else{ 
  if(image.height>iheight){   
  ImgD.height=iheight; 
  ImgD.width=(image.width*iheight)/image.height;   
  }else{ 
  ImgD.width=image.width;   
  ImgD.height=image.height; 
  } 
  //ImgD.alt=ImgD.alt+"图片尺寸："+image.width+"×"+image.height; 
  } 
 } 
}  

function imgzoom(img,maxsize){
	var a=new Image();
	a.src=img.src
	if(a.width > maxsize )
	{
		img.style.width=maxsize;
	}
	
	return false;
}
//-->