<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"/> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0"> <title>test</title> <meta name="keywords" content=""/> <meta name="description" content=""/> <link type="text/css" rel="stylesheet" href="http://j.laohe360.net/css/pub.css"/> <script charset="utf-8" type="text/javascript" src="http://www.php100.com/statics/js//php100/js/jquery.js"></script> <script> $(document).ready(function () { //alert(document.documentElement.clientHeight); //alert(document.documentElement.clientWidth); var iWidth=500; //弹出窗口的宽度; var iHeight=400; //弹出窗口的高度; var iTop = (document.documentElement.clientHeight-iHeight)/2; //获得窗口的垂直位置; var iLeft = (document.documentElement.clientWidth-iWidth)/2; //获得窗口的水平位置; $("#tpsp").height(iHeight) .width(iWidth) .css('position','absolute') .css("top",iTop) .css("left",iLeft) .css("background",'red'); }); </script> </head> <body> <div id="tpsp"> </div> </body> </html>