<script language="JavaScript">
<!-- Begin
function redirectPage() {
if ((screen.width == 640) && (screen.height == 480))
size = "640 x 480";
else if ((screen.width == 800) && (screen.height == 600))
size = "800 x 600";
else if ((screen.width == 1024) && (screen.height == 768))
size = "1024 x 768";
else size = "the default 640 x 480";
alert("经系统检测，你的屏幕分辨率为 " + size + "，你的显示器适于....");
}
// End -->
</script>
<form>
                    <input type=button value="检测屏幕分辨率!" onClick="redirectPage()" name="button">
                  </form>