function popWindow(url,popWidth,popHeight)
{
  if ((document.all) ||
      (document.layers))
    {
	  var popLeft = screen.availWidth / 6;
	  var popTop = screen.availHeight / 5;
	}
  
  if (document.all)
    {
	  var remote = window.open(url,"","width="+popWidth+",height="+popHeight+",left="+popLeft+",top="+popTop+",resizable=no,scrollbars=auto,toolbars=no,status=no");
	}

	else if (document.layers)
    {
      var remote = window.open(url,"","width="+popWidth+",height="+popHeight+",screenX="+popLeft+",screenY="+popTop+",resizable=no,scrollbars=auto,toolbars=no,status=no");
	  remote.focus();
	}
	
  else if (window.open)
    {
      var remote = window.open(url,"","width="+popWidth+",height="+popHeight+",resizable=no,scrollbars=auto,toolbars=no,status=no");
	  remote.focus();
	}

  else
    {
	  window.top.location.href = url;
	}
}