function popUpCenteredWindow(afile) {
     var iMyWidth;
     var iMyHeight;
     file:
     iMyWidth = (window.screen.width/2) - (350 + 10); file:
     iMyHeight = (window.screen.height/2) - (250 + 50); file:
     var win2 =
window.open(afile,"Window2","status,height=500,width=700,resizable=yes,left="
+ iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" +
iMyHeight + ",scrollbars=yes");
     win2.focus();
}