JavaScript picture magnifying glass effect code [the code is relatively simple]_image special effects

<style type="text/css"> #div1 { width:304px; height:222px; position:relative; margin:30px auto 0px;} #div1 img{width:304px; height:222px;} #div1 span { width:100px; height:100px; background:red; left:0px;top:0px; position:absolute; display:none; filter:alpha(opacity:20); opacity:0.2;} .show { width:100%; height:100%; background:red; position:absolute; z-index:10px; filter:alpha(opacity:10); opacity:0.1; left:0px; top:0px; } #div2 {width:304px; height:222px; position:relative; display:none; overflow:hidden; margin:0px auto 0px;} #img1 { position:absolute;} </style> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>JavaScript image enlargement code</title> <div id="div1"> <img src="http://files.jb51.net/demoimg/201102/11_2_2.jpg" alt="JavaScript picture magnifying glass effect code [the code is relatively simple]_image special effects" > <span> </span><div class="show"> </div> </div> <div id="div2"> <img id="img1" src="http://files.jb51.net/demoimg/201102/11_2_2.jpg" alt="JavaScript picture magnifying glass effect code [the code is relatively simple]_image special effects" > </div>