// drop down menu
function makeChildVisible(parentId) {
	var parent_object = document.getElementById(parentId);
	var children = parent_object.getElementsByTagName("ul");
	children[0].style.display = "block";
	children[0].style.position = "absolute";
	//var link_object = parent_object.getElementsByTagName('a');
	//link_object[0].style.backgroundColor = "#e4ecf5";
}
function makeChildInvisible(parentId) {
	var parent_object = document.getElementById(parentId);
	var children = parent_object.getElementsByTagName("ul");
	children[0].style.display = "none";
	//var link_object = parent_object.getElementsByTagName('a');
	//link_object[0].style.backgroundColor = "#fff";
	//link_object[0].style.backgroundImage = "../images/divider.jpg";
}