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(".sub-nav").hide();
	    jQuery("#product-top-nav > li, .sub-nav, .sub-nav li").mouseover( 
	    	function(eventObject) {
	    		clearTimeout(subNavTimer);
	    		showSubNav(this);
			}
		);
		jQuery("#product-top-nav > li").mouseout(
	    	function(eventObject) {
	    		subNavTimer = setTimeout(
					function(){ hideSubNav(jQuery(".sub-nav")); },
					subNavDisappearDelay
				);							    		
			}
		);
	}
	function showSubNav(navItem) {
		jQuery(navItem).children("ul:first").fadeIn(subNavFadeSpeed);
	}
	function hideSubNav(subNavItem) {
		jQuery(subNavItem).fadeOut(subNavFadeSpeed);
		clearTimeout(subNavTimer);
	}