function openWin(file, theX, theY, theName)
{
       var theHeight = screen.availHeight;
       if (Math.round((theHeight - theY )/2) < 0)
       {
           theTop = "0px";
       }
       else
       {
           theTop = Math.round((theHeight - theY)/2) + "px";
       }
       var theWidth = screen.availWidth;
       if (Math.round((theWidth - theX )/2) < 0)
       {
           theLeft = "0px";
       }
       else
       {
           theLeft = Math.round((theWidth - theX)/2) + "px";
       }
       win = window.open(file, theName,"menubar=0,resizable=1,location=0,status=0,scrollbars=1,width="+theX+",height="+theY+",left="+theLeft+",top="+theTop);
}