function nav_off() {
	var navs = new Array();
	navs[0] = document.getElementById("resources");
	navs[1] = document.getElementById("faqs");	
	navs[2] = document.getElementById("useful-links");	
	navs[3] = document.getElementById("about-catalyst");	
	for (i = 0; i < navs.length; i++) {
		navs[i].style.backgroundImage = "";
	}
}

function nav_over(item, section) {
	nav_off();
	switch(section) {
		case 0:
			item.style.backgroundImage = "url(images/content-nav-over-teachers.png)";
			break;
		case 1:
			item.style.backgroundImage = "url(images/content-nav-over-line-managers.png)";			
			break;
		case 2:
			item.style.backgroundImage = "url(images/content-nav-over-business.png)";			
			break;
	}
}

function nav_out(item, section) {
	switch(section) {
		case 0:
			item.style.backgroundImage = "";
			break;
		case 1:
			item.style.backgroundImage = "";			
			break;
		case 2:
			item.style.backgroundImage = "";			
			break;
	}
}

function top_nav_over(item, section) {
	var navs = new Array();
	navs[0] = document.getElementById("how-it-works");
	navs[1] = document.getElementById("why-take-part");	
	navs[2] = document.getElementById("who-can-take-part");	
	navs[3] = document.getElementById("your-commitment");	
	navs[4] = document.getElementById("testimonials");
	for (i = 0; i < navs.length; i++) {
		if (navs[i] != item) {
			navs[i].style.backgroundImage = "";
		}
	}	
	switch(section) {
		case 0:						
			item.style.backgroundImage = "url(images/teachers-nav-back.jpg)";
			break;
		case 1:
			item.style.backgroundImage = "url(images/line-managers-nav-back.jpg)";			
			break;
		case 2:
			item.style.backgroundImage = "url(images/business-nav-back.jpg)";			
			break;
	}	
}

function top_nav_out(item, section) {
	switch(section) {
		case 0:
			item.style.backgroundImage = "";
			break;
		case 1:
			item.style.backgroundImage = "";			
			break;
		case 2:
			item.style.backgroundImage = "";		
			break;
	}	
}