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css+js完美控制图片大小
本文标签：图片大小
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>css+js完美控制图片大小</title> <script type="text/javascript" language="JavaScript"> <!-- var flag=false; function DrawImage(ImgD){ var image=new Image(); image.src=ImgD.src; if(image.width>0 && image.height>0){ flag=true; if(image.width/image.height>= 400/400){ if(image.width>400){ ImgD.width=400; ImgD.height=(image.height*400)/image.width; }else{ ImgD.width=image.width; ImgD.height=image.height; } ImgD.alt=image.width+"x"+image.height; } else{ if(image.height>400){ ImgD.height=400; ImgD.width=(image.width*400)/image.height; }else{ ImgD.width=image.width; ImgD.height=image.height; } ImgD.alt=image.width+"x"+image.height; } } } //--> </script> <style type="text/css"> <!-- * { margin:0; padding:0; } li { list-style:none; } img { border:0; } .group_head { width:400px; height:400px; line-height:400px; border:1px solid #ccc; overflow:hidden; position:relative; text-align:center; float:left; margin-right:10px; } .group_head p { position:static; +position:absolute; top:50%; vertical-align:middle } .group_head img { position:static; +position:relative; top:-50%;left:-50%; vertical-align:middle } --> </style> </head> <body> <ul class="jobGroup"> <li><div class="group_head"><p><img width="400" height="400" src="http://www.baidu.com/img/baidu_logo.gif" onload="DrawImage(this);"/></P><br><INPUT onclick=runEx('runcode') type=button value=运行代码 /><br> </span> </td> </tr> </table> <br> </div> <div id="st-right" class="col-lg-wide-25 col-xs-1 padding-0 hidden-xs" style="height:100%;"><br> <table width="300" border="0" cellspacing="5" cellpadding="2" bgcolor="#FF9933" align="CENTER"> <tr> <td> <div align="CENTER">技术文章快速查找</div> </td> </tr> </table> <table width="300" border="0" cellspacing="1" cellpadding="2" bgcolor="#FF9933" align="CENTER"> <tr> <td bgcolor="#FFFFFF"> <table width="98%" border="0" cellspacing="0" cellpadding="2" class="unnamed1" align="center"> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/33807.html" target="_blank"> jQuery模板技术和数据绑定实现代码 </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/76191.html" target="_blank"> 使用jQuery的attr方法来修改onclick值 </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/38934.html" target="_blank"> 通过js判断访客显示器屏幕分辨率并给出提示 </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/37349.html" target="_blank"> JavaScript 产生不重复的随机数三种实现思路 </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/33748.html" target="_blank"> JS request函数 用来获取url参数 </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/31887.html" target="_blank"> javascript 客户端验证上传图片的大小（兼容IE和火狐） </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/31702.html" target="_blank"> javascript 字符 Escape,encodeURI,encodeURIComponent </a> </td> </tr> <tr> <td><a href="http://www.zhujiangroad.com/program/JavaScript/72078.html" target="_blank"> Javascript高级技巧分享 </a> </td> </tr> </table> </td> </tr> </table> <br> <table width="300" border="0" cellspacing="5" cellpadding="2" bgcolor="#FF9933" align="CENTER"> <tr> <td> <div align="CENTER"><b class="unnamed1">相关下载</b></div> </td> </tr> </table> <table width="300" border="0" cellspacing="1" cellpadding="2" bgcolor="#FF9933" align="CENTER"> <tr> <td bgcolor="#FFFFFF"> <table width="290" border="0" cellspacing="0" cellpadding="2" align="center" class="unnamed1" > </table> </td> </tr> </table> <br> <table width="300" border="0" cellspacing="5" cellpadding="2" bgcolor="#FF9933" align="CENTER"> <tr> <td> <div align="CENTER"><b class="unnamed1">在线教程导航</b></div> </td> </tr> </table> <table width="300" border="0" cellspacing="1" cellpadding="2" 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