var W3CDOM = (document.createElement && document.getElementsByTagName);

activateMenu = function(nav) {

	/* currentStyle restricts the Javascript to IE only */
	if (document.all && document.getElementById(nav).currentStyle) {  

		var navroot = document.getElementById(nav);
		/* Get all the list items within the menu */
		var lis=navroot.getElementsByTagName('LI');  
		for (i=0; i<lis.length; i++) {

			/* If the LI has another menu level */
			if(lis[i].lastChild.tagName=='UL'){

				/* assign the function to the LI */
				lis[i].onmouseover=function() {	
					/* display the inner menu */
					this.lastChild.style.display='block';
				}
				lis[i].onmouseout=function() {                       
					this.lastChild.style.display='none';
				}
			}
		}
	}
}

function init() {
	activateMenu('cssmenunav'); 
	if (!W3CDOM) return;
}

window.onload = init;