function imgOn(imgName)
{if (document.images) {document[imgName].src=eval(imgName+"on.src");}}

function imgOff(imgName)
{if (document.images) {document[imgName].src=eval(imgName+"off.src");}}

if (document.images)
{
imgserv1on=new Image(); imgserv1on.src="img/snav_service_over.gif";
imgserv1off=new Image(); imgserv1off.src="img/snav_service_off.gif";

imgserv2on=new Image(); imgserv2on.src="img/snav_produkt_over.gif";
imgserv2off=new Image(); imgserv2off.src="img/snav_produkt_off.gif";

imgserv3on=new Image(); imgserv3on.src="img/snav_entwicklung_over.gif";
imgserv3off=new Image(); imgserv3off.src="img/snav_entwicklung_off.gif";

imgserv4on=new Image(); imgserv4on.src="img/snav_modellbau_over.gif";
imgserv4off=new Image(); imgserv4off.src="img/snav_modellbau_off.gif";

imgserv5on=new Image(); imgserv5on.src="img/snav_elektronik_over.gif";
imgserv5off=new Image(); imgserv5off.src="img/snav_elektronik_off.gif";

imgserv6on=new Image(); imgserv6on.src="img/snav_grafik_over.gif";
imgserv6off=new Image(); imgserv6off.src="img/snav_grafik_off.gif";

imgserv7on=new Image(); imgserv7on.src="img/snav_user_over.gif";
imgserv7off=new Image(); imgserv7off.src="img/snav_user_off.gif";

imgserv8on=new Image(); imgserv8on.src="img/e_snav_product_over.gif";
imgserv8off=new Image(); imgserv8off.src="img/e_snav_product_off.gif";

imgserv9on=new Image(); imgserv9on.src="img/e_snav_engine_over.gif";
imgserv9off=new Image(); imgserv9off.src="img/e_snav_engine_off.gif";

imgserv10on=new Image(); imgserv10on.src="img/e_snav_model_over.gif";
imgserv10off=new Image(); imgserv10off.src="img/e_snav_model_off.gif";

imgserv11on=new Image(); imgserv11on.src="img/e_snav_electronics_over.gif";
imgserv11off=new Image(); imgserv11off.src="img/e_snav_electronics_off.gif";

}