<!--//
var agt = navigator.userAgent.toLowerCase();  
var is_major = parseInt(navigator.appVersion);  
var is_minor = parseFloat(navigator.appVersion);  
var is_ie = (agt.indexOf("msie") != -1); 
var is_ie4up = (is_ie  && (is_major >= 4)); 
if (is_ie4up) { document.write(""); } 

if (document.images) {            // Active Images
	img1on = new Image();      
	img1on.src = "img/btn_about_on.gif"; 
	img2on = new Image(); 
	img2on.src = "img/btn_faq_on.gif";  
	img3on = new Image();
	img3on.src = "img/btn_schedule_on.gif";
	img4on = new Image();
	img4on.src = "img/btn_tuition_on.gif";
	img5on = new Image();
	img5on.src = "img/btn_model_on.gif";
	img6on = new Image();
	img6on.src = "img/btn_services_on.gif";
	img7on = new Image();      
	img7on.src = "img/btn_contact_on.gif";
	img8on = new Image();      
	img8on.src = "img/btn_home_on.gif";
}

// Function to 'activate' images.
// Image naming must include '_on' or '_off'
function imgOn(imgName) { 
	if (document.images) {
		document[imgName].src = document[imgName].src.replace(/_off/, "_on");
	}
}

// Function to 'deactivate' images.
function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = document[imgName].src.replace(/_on/, "_off");
	}
}
// -->