//Browser ueberpruefen 

browser_name = navigator.appName;
browser_version = parseFloat(navigator.appVersion); 

if (browser_name == "Netscape" && browser_version < 2.0)
	{roll = 'false';}
else if (browser_name == "Netscape" && browser_version == 2.0)
	{roll = 'false';}
else if (browser_name == "Netscape" && browser_version >= 3.0)
	{roll = 'true';}
else if (browser_name == "Microsoft Internet Explorer" && browser_version <= 2.0)
	{roll = 'false';}
else if (browser_name == "Microsoft Internet Explorer" && browser_version >= 3.0)
	{roll = 'true';}
else if (browser_version >= 4.0) 
	{roll = 'true';}
else
	{roll = 'false';}

//Pfeil anzeigen
function msover(img,ref)
	{if (roll == 'true')
		{document.images[img].src = ref;}
	}

//Pfeil auschalten
function msout(img,ref)
	{if (roll == 'true')
		{document.images[img].src = ref;}
	}

//Navigations Button
menu1on = new Image();
menu1on.src = "img/nav_about_on.gif";
menu2on = new Image();
menu2on.src = "img/nav_services_on.gif";
menu3on = new Image();
menu3on.src = "img/nav_clients_on.gif";
menu4on = new Image();
menu4on.src = "img/nav_products_on.gif";
menu5on = new Image();
menu5on.src = "img/nav_contacts_on.gif";
//menu6on = new Image();
//menu6on.src = "images/nav_kunden_on.gif";

//