windowOnLoad = function() {

	if (document.all && document.getElementById) {

		navRoot = document.getElementById("nav");
		for (i=0; i<navRoot.childNodes.length; i++) {
			node = navRoot.childNodes[i];
			if (node.nodeName == "LI") {
				node.onmouseover = function() {
					this.className += " over";
				}
				node.onmouseout = function() {
					this.className = this.className.replace(" over", "");
				}
			}
		}
	}


	

}



function showBookList() {

	objBookList = document.getElementById("book-list");
	objBookList.style.visibility = "visible";

}

function hideBookList() {
	objBookList = document.getElementById("book-list");	
	objBookList.style.visibility = "hidden";
}


function showAboutMenu() {

	objAboutMenu = document.getElementById("aboutmenu");
	objAboutMenu.style.visibility = "visible";

}


function hideAboutMenu() {
	objAboutMenu = document.getElementById("aboutmenu");	
	objAboutMenu.style.visibility = "hidden";
}

function showNewMenu() {

	objNewMenu = document.getElementById("newmenu");
	objNewMenu.style.visibility = "visible";

}

function hideNewMenu() {
	objNewMenu = document.getElementById("newmenu");	
	objNewMenu.style.visibility = "hidden";
}


function showServiceMenu() {

	objServiceMenu = document.getElementById("servicemenu");
	objServiceMenu.style.visibility = "visible";

}

function hideServiceMenu() {
	objServiceMenu = document.getElementById("servicemenu");	
	objServiceMenu.style.visibility = "hidden";
}