// centrepac js
$(document).ready(
	function() {
		// nav rollover
		$('#nav a').hover(function(){nav_over($(this))}, function(){nav_out($(this))});
		
		// tweak table output
		if($('body.devanning').length > 0 || $('body.search').length > 0) {
			// add class to first td in each row
			$('tr').each(function() {
					$(this).find('td:first').addClass('first');
					$(this).find('th:first').addClass('first');	
				});
			
		}
	}
);


// nav rollover function
function nav_over(el) {
	// we don't need to highlight the currently highlighted nav item
	if(el.attr('class') == 'on') {
		return;
	}
	// change img src
	el.find('img').attr('src', 'img/nav/' + el.attr('id') + '-on.gif');
}

// rollout function
function nav_out(el) {
	if(el.attr('class') == 'on') {
		return;
	}
	// change img src back
	el.find('img').attr('src', 'img/nav/' + el.attr('id') + '.gif');
}