function openPopup(url,name,x,y,toolbar,scrollbars,resizable){	
	if(window.popup)
	{
      if (!(popup.closed)) { popup.close(); }
      openwin(url, name, x, y, toolbar, scrollbars, resizable);
    }
	else
	{
      openwin(url, name, x, y, toolbar, scrollbars, resizable);
	}
}

function openwin(url, name, x, y, toolbar, scrollbars, resizable)
{
   topofwin = screen.availHeight/2 - y/2;
   leftofwin = screen.availWidth/2 - x/2;

	var popup = window.open(url,name,"toolbar=" + toolbar + ",location=0,directories=0,status=0,menubar=0,scrollbars=" + scrollbars +",resizable=" + resizable + ",width=" + x + ",height=" + y);
popup.moveTo(leftofwin,topofwin);
    if (navigator.appName == "Microsoft Internet Explorer") 
    {
      popup.resizeTo((parseInt(x)+10),(parseInt(y)+50));
    }
    else popup.resizeTo(x,y);
    if (navigator.userAgent.indexOf("Mozilla/3.0") != -1  || navigator.userAgent.indexOf("Mozilla/4.0") != -1)
      {
         popup.focus();
      }	
}