设置开启窗口的开始坐标(x,y)不起作用？


echo "<script language='javascript'>";
echo "function openNewWindow()";
    echo "{";
echo "ScreenHeight=window.screen.height;";
echo "ScreenWidth=window.screen.width ;";
 
echo "cw=window.open('index.php','','menubar=0,directories=n,fullscreen=no,resizable=2,width=800,height=600,(ScreenWidth-800)/2,(ScreenHeight-800)/2,scrollbars=no');";
echo "cw.resizeTo(800,600);";
echo "opener='self';";
echo "window.close();";
echo "}";
echo "</script>";
 
 echo "<body  onload='openNewWindow()'>";