function hoverOn(image){
	var menu_path = document.getElementById(image).src;
	var new_menu_path = menu_path.replace("off", "on");
	document.getElementById(image).src = new_menu_path;
	
	//switch header image
	switch(image)
	{
	case "img_menu_immanuel":
	document.getElementById('img_header').src = "cms/images/cover/immanuel_collection.jpg";
	  break;
	case "img_menu_heide":
	document.getElementById('img_header').src = "cms/images/cover/ankleidekrippe_heide.jpg";
	  break;
	case "img_menu_jerusalem":
	document.getElementById('img_header').src = "cms/images/cover/jerusalem_heide.jpg";
	  break;	  
	}	
	
}

function hoverOff(image){
	var menu_path = document.getElementById(image).src;
	var new_menu_path = menu_path.replace("on", "off");
	document.getElementById(image).src = new_menu_path;
}