function OpenWin(url,windowname,width,height)
{
 if (!url)
 {
 alert ("Please specify a URL to open");
 return false;
 }
 if (!windowname) windowname = 'newwin';
 if (!width) width = 300;
 if (!height) height = 350;
  var properties = "menubar=no,toolbars=no,directory=no,scrolling=no,status=yes,scrollbars=no,resizable=no,maximize=yes,width="+width+",height="+height;
  var newWin = window.open(url,windowname,properties);
  newWin.focus();
}