<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>