function OpenWindow()
{
var MyWindow;
 MyWindow = open(
   "chat.php",
   "MyWindowOpen",
   "width=820, height=610, toolbar=no,location=no,directories=no,status =no,menubar=no,scrollbars=yes,resizable=no,copyhistory=no");
 MyWindow.moveTo(10,10);
 MyWindow.focus();
}