function updateLink(link){
	unselectAllLinks();
	$(link).className = 'mainLinkSelected';
}

function unselectAllLinks(){
	$('aboutLink').className = 'mainLinkUnselected';
	$('servicesLink').className = 'mainLinkUnselected';
	$('careersLink').className = 'mainLinkUnselected';
	$('contactLink').className = 'mainLinkUnselected';
	$('employeesLink').className = 'mainLinkUnselected';
}

function showCareersSubMenu(){
	var menuLeft = $('careersLink').offsetLeft;
	var menuTop = $('careersLink').offsetTop;
	
	//adjust for ie
	if (document.all){
		var offsetLeft2 = $('careersLink').offsetParent.offsetLeft;
		var offsetLeft3 = $('careersLink').offsetParent.offsetParent.offsetLeft;
		menuLeft = menuLeft + offsetLeft2 + offsetLeft3;
		
		var offsetTop2 = $('careersLink').offsetParent.offsetTop;
		var offsetTop3 = $('careersLink').offsetParent.offsetParent.offsetTop;
		menuTop = menuTop + offsetTop2 + offsetTop3;
	}
	
	$('careersSubMenu').style.left = menuLeft - 5;
	$('careersSubMenu').style.top = menuTop + 20;
	$('careersSubMenu').style.visibility = "visible";
}

function hideCareersSubMenu(){
	$('careersSubMenu').style.visibility = "hidden";
}