<div style="backgroud-color:#000000;padding-left:20px;width:300px;"> <img src="http://www.google.cn/intl/zh-CN/images/logo_cn.gif"/> </div> <input type="button" value="Bilblt" onclick="Bitblt()"/> <script> function Bitblt() ...{ var _div=document.getElementsByTagName("div")[0]; var _img=document.getElementsByTagName("img")[0]; var oridivwidth=parseInt(_div.style.width); var Rate1=parseInt(oridivwidth/100); var oridivpaddingleft=parseInt(_div.style.paddingLeft); var oriimgwidth=parseInt(_img.width); _div.style.width=parseInt(oridivwidth/Rate1); _div.style.paddingLeft=parseInt(oridivpaddingleft/Rate1); _img.width=parseInt(oriimgwidth/Rate1); } </script>