//homepage tabs
$(document).ready(function() {

	//When page loads...
	$(".tab_content").hide(); //Hide all content
	$("ul.tabs li:first").addClass("active").show(); //Activate first tab
	$(".tab_content:first").show(); //Show first tab content

	//On Click Event
	$("ul.tabs li").click(function() {

		$("ul.tabs li").removeClass("active"); //Remove any "active" class
		$(this).addClass("active"); //Add "active" class to selected tab
		$(".tab_content").hide(); //Hide all tab content

		var activeTab = $(this).find("a").attr("href"); //Find the href attribute value to identify the active tab + content
		$(activeTab).fadeIn(); //Fade in the active ID content
		return false;
	});

});

// show/hide subnavs
	var timeout    = 500;
	var closetimer = 0;
	var navitem = 0;

	function nav_open(){
		nav_canceltimer();
		   nav_close();
		   show_sub();
		   navitem = $(this).find('ul').css('visibility', 'visible');

	}

	function nav_close(){
		if(navitem) navitem.css('visibility', 'hidden');

	}

	function nav_timer(){
		closetimer = window.setTimeout(hide_sub, timeout);
	}

	function nav_canceltimer(){
		if(closetimer){
			window.clearTimeout(closetimer);
		        closetimer = null;
	}}
	
	function hide_sub(){
	$("#subnavAbout,#subnavResearch,#subnavNews,#subnavResources").fadeOut("slow");
	}
	
	function show_sub(){
	$("#subnavAbout,#subnavResearch,#subnavNews,#subnavResources").fadeIn("slow");
	}


	$(document).ready(function(){
		$('#nav > li').bind('mouseover', nav_open)
		$('#nav > li').bind('mouseout',  nav_timer)
	});