var home_on = new Image();
var home_off = new Image(); 
var corporate_on = new Image(); 
var corporate_off = new Image();
var products_on = new Image(); 
var products_off = new Image(); 
var contact_on = new Image(); 
var contact_off = new Image(); 
var tech_on = new Image(); 
var tech_off = new Image(); 
	
	home_off.src = "images/home_0.gif";
	home_on.src = "images/home_1.gif";
	corporate_off.src = "images/corporate_0.gif";
	corporate_on.src = "images/corporate_1.gif";
	products_off.src = "images/products_0.gif";
	products_on.src = "images/products_1.gif";
	contact_off.src = "images/contactus_0.gif";
	contact_on.src = "images/contactus_1.gif";
	tech_off.src = "images/techsupport_0.gif";
	tech_on.src = "images/techsupport_1.gif";
	
	function imgOn(imgName) {
	
	if (document.images) {
	
	document.images[imgName].src = eval(imgName + "_on.src");
	
	}
	
	
	}
	
	function imgOff(imgName) {
	
	if (document.images) {
	
	document.images[imgName].src = eval(imgName + "_off.src");
	
	}
	
	
	}