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

	if (document.images) {
		newson = new Image();
		newson.src = "images/navigation/news_on.gif";
		newsoff = new Image();
		newsoff.src = "images/navigation/news_off.gif";
		contacton = new Image();
		contacton.src = "images/navigation/contact_on.gif";
		contactoff = new Image();
		contactoff.src = "images/navigation/contact_off.gif";
		producton = new Image();
		producton.src = "images/navigation/product_on.gif";
		productoff = new Image();
		productoff.src = "images/navigation/product_off.gif";
		engineeron = new Image();
		engineeron.src = "images/buttons/engineer_on.gif";
		engineeroff = new Image();
		engineeroff.src = "images/buttons/engineer_off.gif";
		flooron = new Image();
		flooron.src = "images/buttons/floor_on.gif";
		flooroff = new Image();
		flooroff.src = "images/buttons/floor_off.gif";
		replacementon = new Image();
		replacementon.src = "images/buttons/replacement_on.gif";
		replacementoff = new Image();
		replacementoff.src = "images/buttons/replacement_off.gif";
		scooterson = new Image();
		scooterson.src = "images/buttons/scooters_on.gif";
		scootersoff = new Image();
		scootersoff.src = "images/buttons/scooters_off.gif";
		turnkeyon = new Image();
		turnkeyon.src = "images/buttons/turnkey_on.gif";
		turnkeyoff = new Image();
		turnkeyoff.src = "images/buttons/turnkey_off.gif";
		wheelchairon = new Image();
		wheelchairon.src = "images/buttons/wheelchair_on.gif";
		wheelchairoff = new Image();
		wheelchairoff.src = "images/buttons/wheelchair_off.gif";
		replacement2on = new Image();
		replacement2on.src = "images/buttons/replacement2_on.gif";
		replacement2off = new Image();
		replacement2off.src = "images/buttons/replacement2_off.gif";
	}

	function img_inact(imgName){
		if (document.images){
			imgOff = eval(imgName + "off.src");
			document [imgName].src = imgOff;
		}
	}
	function jumpPdf (menu) {
		choice = menu.selectedIndex;
		if (menu.options[choice].value != "") {
			window.location = 'pdf/' + menu.options[choice].value;
		}
	}	
	function go_back() {
		if (document.forms) {
			for(var z = 0; z < document.forms.length; z++) {
				document.forms[z].reset();
			} 
		}
	}