function log(str) {
	if (!str) str="";
	console.log(str + ' <--');
}

function addMouseEvents(section) {
	var blurbId = section + '_blurb';

	var linkId = section + '_link';
	var link = $(linkId);

	// default is the About the Program info

	link.addEvent('mouseenter', function() {
//		$('banner').setStyle('background-image', 'url(images/nav_' + section + '.jpg)');	
		this.setStyle('background-image', 'url(images/nav_' + section + '_h.gif)');

		// replace default blurb with text associated with rolled over link
		$('default_blurb').className = ('hide');
		$(blurbId).className = ('');
	});
	
	link.addEvent('mouseleave', function() {
//		$('banner').setStyle('background-image', 'url(images/nav_default.jpg)');	
		this.setStyle('background-image', 'url(images/nav_' + section + '.gif)');
		
		// display default blurb
		$(blurbId).className = ('hide');
		$('default_blurb').className = ('');
	});
}

function changeBackgroundImage() {
	// preload bg images 
	preloadBgImgs();
	// (re)set the default behavior for the mouse events for the down arrow			
	addMouseEvents('about');
	addMouseEvents('interviews');
	addMouseEvents('outreach');
	addMouseEvents('caregiver');
	addMouseEvents('watch');
	//addMouseEvents('default');
	
	// Added 2008-03-26 by mitch_smith
	$('search_button').addEvent('mouseenter', function() {this.src='images/b_search_h.gif';});
	
	$('search_button').addEvent('mouseleave', function() {this.src='images/b_search.gif';});
}

// Added 2008-03-26 by mitch_smith

function preloadBgImgs() {
	var bg_files = ['images/nav_about_h.gif',
'images/nav_about.gif',
'images/nav_caregiver_h.gif',
'images/nav_caregiver.gif',
'images/nav_outreach_h.gif',
'images/nav_outreach.gif',
'images/nav_default.jpg',
'images/nav_doctor_h.gif',
'images/nav_doctor.gif',
'images/nav_watch_h.gif',
'images/nav_watch.gif',
'images/arrow_close.gif',
'images/arrow_open.gif',
'images/arrow_quickguide_close.gif',
'images/arrow_quickguide_close.gif',
'images/arrow_quickguide.gif',
'images/arrow_quickguide.gif',
'images/b_close.gif',
'images/b_open.gif',
'images/banner_glossary.jpg',
'images/banner_inner.gif',
'images/bg_tile_onecol.gif',
'images/bg_tile_twocol.gif',
'images/dot_large.gif',
'images/dot_small.gif',
'images/footer_top.gif',
'images/i_caringforcaregiver.jpg',
'images/i_finances.jpg',
'images/i_gettingstarted.jpg',
'images/i_healthcare.jpg',
'images/i_homecare.jpg',
'images/i_hp.jpg',
'images/i_insurance.jpg',
'images/i_legalissues.jpg',
'images/i_stayingactive.jpg',
'images/i_transportation.jpg',
'images/qg_bg.gif',
'images/square_black_l.gif',
'images/square_gray_l.gif',
'images/square_gray.gif',
'images/square0.gif',
'images/square1.gif',
'images/square2.gif',
'images/square3.gif',
'images/square4.gif',
'images/square5.gif',
'images/b_search.gif',
'images/b_search_h.gif',
'images/video_top.gif'];
	if (document.images) {
		var bg_imgs = new Array();
		for (i = 0; i < bg_files; i++) {
			bg_imgs[i] = new Image();
			bg_imgs[i].src = bg_files[i];
		}
	}
}


window.addEvent('domready', changeBackgroundImage);