图片自适应窗口大小
我在做产品图片展示时 
 图片显示用代码: 
 onLoad= 'javascript:if(this.width> =this.height&&this.width> =100){this.width=100};if   
 (this.height> this.width&&this.height> =100){this.height=100}; ' 
 这样可以使图片自适应大小..   
 但为什么每次打开图片有的会撑得很大,只有再刷新一下才不会. 
 有没有更好的方法可以控制图片自适应大小.. 
 ....................... 
 在http://community.csdn.net/Expert/topic/5401/5401875.xml?temp=.1382105我提问过,可是没人给我确定答案啊..
------解决方案--------------------是不是有个onsize事件,在这个事件里写应该问题不太大吧.
------解决方案--------------------js就是用onLoad,没见过你的情况
------解决方案--------------------放在 image里不行吗, 
 也可以用个iframe来控制
------解决方案--------------------百度的做法:       
 function DownImage(ImgD,MaxWidth,MaxHeight,alignX,alignY) 
 { 
 	alignX=alignX||1; 
 	alignY=alignY||1; 
     var image=new Image(); 
     image.src=ImgD.src; 
     if(image.width> 0 && image.height> 0) 
 	{ 
 		var rate = (MaxWidth/image.width  < MaxHeight/image.height)?MaxWidth/image.width:MaxHeight/image.height; 
 		var wid=0; 
 		var hid=0; 
 		if(rate  <= 1) 
 		{ 
 			wid=ImgD.width=image.width*rate; 
 			hid=ImgD.height=image.height*rate; 
 		} 
 		else 
 		{ 
 			wid=ImgD.width=image.width; 
 			hid=ImgD.height=image.height; 
 		} 
 		if(alignX==1) 
 		{ 
 			var ii=(MaxWidth-wid)/2; 
 			ImgD.style.marginLeft=ImgD.style.marginRight=ii+ "px "; 
 		} 
 		if(alignY==1) 
 		{ 
 			var ii=(MaxHeight-hid)/2; 
 			ImgD.style.marginTop=ImgD.style.marginBottom=ii+ "px "; 
 		} 
     } 
 }   
 使用:img 对象的 onload= "DownImage(this,100,100,-1,1); "
------解决方案--------------------//--楼主可以参看如下代码http://blog.csdn.net/hertcloud/archive/2007/03/26/1541528.aspx     
  <!DOCTYPE HTML PUBLIC  "-//W3C//DTD HTML 4.0 Transitional//EN ">  
  <HTML>  
   <HEAD>  
    <TITLE>  New Document  </TITLE>  
    <style type= "text/css ">  
  .goNote { background-color:#738B3F;width:128; 
  border:1px;font-size:12px;padding:5px;color:white;cursor:pointer; } 
  </style>  
    <SCRIPT LANGUAGE= "JavaScript ">  
    <!-- 
 	function autoResize(o) 
 	{ 
 		if (o.width> 128)  
 		{  
 			o.width = 128; 
 			if (o.parentNode.parentNode.childNodes.length == 1) 
 			{ 
 				var note = document.createElement( "div "); 
 				note.innerHTML =  " <span class=\ "goNote\ " onclick=\ "getSrcPic(this)\ "> 查看原始图片大小 </span>  "; 
 				o.parentNode.parentNode.appendChild(note); 
 			} 
 			else 
 			{ 
 				try 
 				{ 
 					o.parentNode.parentNode.childNodes(1).style.display =  "block "; 
 				} 
 				catch (e) { } 
 			} 
 		} 
 	}   
 	function getSrcPic(o) 
 	{ 
 		var t = o.parentNode.previousSibling.firstChild; 
 		if (t.tagName.toLowerCase() ==  "img ") 
 		{ 
 			t.removeAttribute( "width "); 
 			t.removeAttribute( "height "); 
 			o.parentNode.style.display =  "none ";  
 			//try { o.parentNode.removeNode(true) } catch (e) { o.parentNode.style.display =  "none "; } 
 		} 
 	} 
   //-->  
    </SCRIPT>  
   </HEAD>    
   <BODY>  
   <TABLE>  
   <TR>  
 	 <TD>  <a href= "javascript:void(0) ">  <img id= "myimg " src= "h