十万火急！脚本问题！

<script>
var wh = screen.availHeight
var ww = screen.availWidth
h=wh-28
w=ww-8
var miswin=top.open("Templet/UI/Main.asp?R=" + Math.random() + "&DeptID=" + r,"d","top=0,left=0,height="+h+",width="+w+",fullscreen=true,resizable=1")
miswin.moveTo((ww-8-w)/2,(wh-28-h)/2);
window.top.moveTo(1500,0)
</script>

上面脚本有机子会出错，有的机子不会出错是怎么回事！！！