var subNavTimer = null;
	var subNavFadeSpeed = 200;	/* fade in/out effect speed (note:disabled for ie due to png alpha issues) */
	var subNavDisappearDelay = 1000;	/* ms delay before the sub nav fades out when the mouse moves off */
	
	function initSubNav() {
		if (jQuery.browser.msie) {
			subNavFadeSpeed = 0;
		}
	    jQuery("#vertical-bar-heading.has-rollout, #vertical-bar-sub-nav").mouseover( 
	    	function(eventObject) {
	    		clearTimeout(subNavTimer);
	    		showSubNav();
			}
		);
		jQuery("#vertical-bar-heading.has-rollout, #vertical-bar-sub-nav").mouseout(
	    	function(eventObject) {
	    		subNavTimer = setTimeout(hideSubNav,subNavDisappearDelay);							    		
			}
		);
	}
	function showSubNav() {
		jQuery("#vertical-bar-sub-nav").fadeIn(subNavFadeSpeed);
	}
	function hideSubNav() {
		jQuery("#vertical-bar-sub-nav").fadeOut(subNavFadeSpeed);
		clearTimeout(subNavTimer);
	}