function toggle(elementId) {
	var element = document.getElementById(elementId);
	element.style.display = element.style.display != "block"?"block":"none";
}

function toggleArrow(elementId) {
	var element = document.getElementById("list_"+elementId);
	var elementLink = document.getElementById("link_"+elementId);
	if(element.style.display != "block") {
		element.style.display = "block";
		elementLink.style.backgroundImage = "url(../Images/arrow_up.gif)";
	} else {
		element.style.display = "none";
		elementLink.style.backgroundImage = "url(../Images/arrow_down.gif)";
	}
}