js检测屏幕信息及弹出窗口居中
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Screen</title>
<script type="text/javascript">
function Screen()
{
var num,num1;
//num=screen.availHeight;
//num1=screen.availWidth;
num=screen.height;
num1=screen.width;
alert("屏幕的高度是:"+num+",宽度是:"+num1);
}
function NewOpen()
{
var top=(screen.availHeight-200)/2;
var left=(screen.availWidth-200)/2;
window.open("","_blank","width=200,height=200,top="+top+",left="+left);
}
</script>
</head>
<body>
<input type="button" value="测试" onclick="Screen()"/>
<input type="button" value="弹出窗口" onclick="NewOpen()"/>
</body>
</html>
