rooms0=new Image();
rooms0.src= "images/nav_rooms_off.jpg"; 
rooms1=new Image();
rooms1.src= "images/nav_rooms_on.jpg";

about0=new Image();
about0.src= "images/nav_about_off.jpg"; 
about1=new Image();
about1.src= "images/nav_about_on.jpg";

chef0=new Image();
chef0.src= "images/nav_chefs_off.jpg"; 
chef1=new Image();
chef1.src= "images/nav_chefs_on.jpg";

directions0=new Image();
directions0.src= "images/nav_directions_off.jpg"; 
directions1=new Image();
directions1.src= "images/nav_directions_on.jpg";


function navOn(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + "1.src");
	}
}

function navOff(imgName) {
	if (document.images) {
		document.images[imgName].src = eval(imgName + "0.src");
	}
}