<script>
function test(){
var k=(window.screen.availWidth-400)/2
var g=(window.screen.availHeight-300)/2
pop=window.open("pop.html","弹出窗口","toolbar=no,menubar=no,scrollbars=no,directories=no,resizable=no,location=no,status=no,top=0,left=0,width="+k+",height="+g+"");
}
</script>