function toggleNav(image, element) {

		var subElem = document.getElementById("sub_"+element);
		
		if(subElem.style.display == "block") {
			image.src = "/skin/images/icons/plus_green.png";
			subElem.style.display = "none";
		} else if(subElem.style.display == "none") {
			image.src = "/skin/images/icons/minus_green.png";
			subElem.style.display = "block";
		}
	
}

function showAll() {

	var theSlides = $$('ul.left-nav li ul');
	
	for(var i=0; i < theSlides.length; i++){
		
		if(theSlides[i].id) {
		
			image = document.getElementById('img_'+theSlides[i].id);
			image.src = "/skin/images/icons/minus_green.png";
		
			theSlides[i].style.display = "block";
		}
		
	}

}

function hideAll() {

	var theSlides = $$('ul.left-nav li ul');
	
	for(var i=0; i < theSlides.length; i++){
		
		if(theSlides[i].id) {
			image = document.getElementById('img_'+theSlides[i].id);
			image.src = "/skin/images/icons/plus_green.png";
			theSlides[i].style.display = "none";
			
		}
		
	}

}