if (document.images) {
	n1on = new Image();    n1on.src = "images/menu-home-on.png";
	n2on = new Image();    n2on.src = "images/menu-subjects-on.png";
	n3on = new Image();    n3on.src = "images/menu-sat-act-on.png";
	n4on = new Image();    n4on.src = "images/menu-types-tutoring-on.png";
	n5on = new Image();    n5on.src = "images/menu-our-tutors-on.png";
	
	n6on = new Image();    n6on.src = "images/menu-our-process-on.png";
	n7on = new Image();    n7on.src = "images/menu-about-us-on.png";
	n8on = new Image();    n8on.src = "images/menu-testimonials-on.png";
	n9on = new Image();    n9on.src = "images/menu-faq-on.png";
	n10on = new Image();   n10on.src = "images/menu-partners-on.png";
	n11on = new Image();   n11on.src = "images/menu-contact-us-on.png";
}

function imgOn(img) {
	if (document.images) {
		oSrc=img.src;
		//alert(eval(img.name + "on.src"));
		//return;
		img.src = eval(img.name + "on.src");
	}
}

function imgOff(img) {
	if(oSrc){
		img.src = oSrc;
	}
}

function openMenu(currFile){
	if(currFile){
		//hide 2nd level link
		var links = $$('#leftMenu ul li ul');
		for(var i = 0; i < links.length; i++){
			links[i].hide();
		}
		//show path
		var currLinks = $$('a[href="' + currFile + '"]');
		if(currLinks && currLinks.length && currLinks[0]){
			var currLink = currLinks[0];
			//show if 3nd level clicked
			var parents = currLink.ancestors();
			for(var i = 0; i < parents.length; i++){
				var currElement = parents[i];
				
				if(currElement.id == "leftMenu"){
					break;
				}
				currElement.show();
			}
			//show if 2nd level clicked
			var sibling = currLink.next();
			if(sibling) sibling.show(); 	
		}
	}
}

/*
 * Handlers for automated loading
 */ 
 _LOADERS = Array();

function callAllLoaders() {
	var i, loaderFunc;
	for(i=0;i<_LOADERS.length;i++) {
		loaderFunc = _LOADERS[i];
		if(loaderFunc != callAllLoaders) loaderFunc();
	}
}

function appendLoader(loaderFunc) {
	if(window.onload && window.onload != callAllLoaders)
		_LOADERS[_LOADERS.length] = window.onload;

	window.onload = callAllLoaders;

	_LOADERS[_LOADERS.length] = loaderFunc;
}