$(document).ready(function() {
	// main nav functionality
	$('.navItem').addClass('navStateIdle')
	.click(function() {
		if (!$(this).hasClass('navStateSelect')) {
			// swap nav states
 			$('.navItem').removeClass('navStateSelect');
			$(this).addClass('navStateSelect');
			
			// Display content section
			var nav_id = $(this).attr('id');
			//$('.contentTarget .contentItem').appendTo('#data'); // remove current content
			// add content to layout and display default copy section
			$('.contentTarget').load(nav_id+'.html');
				
			// reset scroll position to top
			$('.contentTarget .scrollContent').scrollTop(0);
		}
	})
	.mouseover(function() {
		$(this).addClass('navStateHover');
		$(this).removeClass('navStateIdle');

	})
	.mouseout(function() {
		$(this).addClass('navStateIdle');
		$(this).removeClass('navStateHover');
	});
	
	// display default content (doesn't have nav item)
	$('.navVideo').click();
	
	// link back to video from masthead
	$('#top_img').click(function() {
		$('.navVideo').click();
	})
}); //ready


// Flash ExternalInterface callback for swapping scrollable copy
function displayCopy(section_str, content_id) {
	// section_str:
	// board, freeways, 91_exp, bus_trasit, rail_transit, streets, motorist, greener, measure
	// content_id:
	// string id for sub content targeting
	$('.contentTarget .copyItem').css('display', 'none');
	$('.contentTarget .scrollContent #'+content_id).css('display', 'block');
	// reset scroll position to top
	$('.contentTarget .scrollContent').scrollTop(0);
	
	return "" ;
}