function openMap(url) {
   width = 500;
   height = 300;
   xPos = (self.screen.width - width) / 2 ;
   yPos = (self.screen.height - height) / 2 ;
   args = "width=" + width + "," + "height=" + height + ",location=0,menubar=0,resizable=1,scrollbars=0,";
   args = args + "status=0,titlebar=0,toolbar=0,hotkeys=0,screenx=" + xPos + ",screeny=" + yPos + ",";
   args = args + "left=" + xPos + "," + "top=" + yPos;
   extChild = window.open("map.php?id="+url,"jefsMap",args);
   if (!extChild.closed) extChild.focus();
}