废柴巧克力 废柴巧克力
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问一个算法 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://tieba.baidu.com/mo/q/checkurl?url=http%3A%2F%2Fwww.w3.org%2FTR%2Fxhtml1%2FDTD%2Fxhtml1-transitional.dtd&urlrefer=e9b2a1e0c6d358d677c4ee0138b67400"> <html xmlns="http://tieba.baidu.com/mo/q/checkurl?url=http%3A%2F%2Fwww.w3.org%2F1999%2Fxhtml&urlrefer=d0f4243b5ce5e5fa54fdafc10831c319"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> </head> <body> <style type="text/css"> #imain{     width:709px;     height:527px;     border:solid 1px #000;     position:absolute;     left:50px;     overflow:hidden; } </style> <div id="imain"><img src="http://tieba.baidu.com/mo/q/checkurl?url=http%3A%2F%2Fyoulunhai.com%2Fimages%2Fuploadfiles%2F20090911094135.jpg&urlrefer=71ef16720fa5900f30d377e482e2afdb" style="position:absolute;" /></div> <script type="text/javascript"> function $(id){return document.getElementById(id);} var ismax=false; var om=$('imain'); var og=om.getElementsByTagName('img')[0]; var ogw=og.offsetWidth; var ogh=og.offsetHeight; //移动时 om.onmousemove=function cli(event){     var event=event || window.event;     var ox=event.clientX-this.offsetLeft     var oy=event.clientY-this.offsetTop     og.style.left=-ox*(og.offsetWidth/om.offsetWidth)+"px"     og.style.top=-oy*(og.offsetHeight/om.offsetHeight)+"px" } </script> </body> </html> 如何让鼠标在外框边缘的时候,图片也正好到了边缘?
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