function check_browser()
{
  var version_number = navigator.appVersion.charAt(0);
  if (navigator.appName.indexOf("Netscape") != -1)
  {
    if (version_number < 3)
    {return false;}
    return true;
  }

  if (navigator.appName.indexOf("Explorer") != -1)
  {
    if (version_number < 4)
    {return false;}
    return true;
  }

  // unknown
  return false;
}


  if (check_browser()) 
{  
	<!--menu-->
	HEAD11 = new Image(50,20);
	HEAD12 = new Image(50,20);
	HEAD13 = new Image(50,20);
	HEAD14 = new Image(50,20);
		
	HEAD11on = new Image(50,20);
	HEAD12on = new Image(50,20);
	HEAD13on = new Image(50,20);
	HEAD14on = new Image(50,20);
	
	BLANK = new Image(118,13);
	
	HEAD11.src = "img/download.gif";
	HEAD12.src = "img/beDonor.gif";
	HEAD13.src = "img/download3.gif";
	HEAD14.src = "img/trailer.gif";
		
	HEAD11on.src = "img/download_pdf_roll.gif";
	HEAD12on.src = "img/beDonor_roll.gif";
	HEAD13on.src = "img/download3D.gif";
	HEAD14on.src = "img/trailerD.gif";
	
	
	BLANK.src = "img/trans.gif"
}



//Nav Bar Pre-Cache (change)
	if (document.images) {
		(new Image()).src = "img/nav/who.gif";
		(new Image()).src = "img/nav/whoD.gif";
		(new Image()).src = "img/nav/programs.gif";
		(new Image()).src = "img/nav/programsD.gif";
		(new Image()).src = "img/nav/recipients.gif";
		(new Image()).src = "img/nav/recipientsD.gif";
		(new Image()).src = "img/nav/donate.gif";
		(new Image()).src = "img/nav/donateD.gif";
		(new Image()).src = "img/nav/publications.gif";
		(new Image()).src = "img/nav/publicationsD.gif";
	}
	
	//Nav Bar MouseOver (do not change)
	function rollOn(imgName, theImg) {
		if (document.images) { document [imgName].src = theImg; }
	}
	
	//Nav Bar MouseOut (do not change)
	function rollOff(imgName, theImg) {
		if (document.images) { document [imgName].src = theImg; }
	}