var timer = null;

function slide(i) {
	var obj = $('#slide_thumbs').find('img').get(i);
	obj = $(obj);
	
	var slide_img = $('#slide_img');
	var desc  = $('div.slide p.texto');	
	
	slide_img.attr('src', obj.attr('img'));
	slide_img.parent().attr('href', obj.attr('url'));
	
	if (''+obj.attr('desc') != 'undefined') {
		desc.html(obj.attr('desc'));
	} else {
		desc.html('');
	}
	
	$('div.slide h3').html(obj.attr('title'));
	slide_img.attr('atual', i);
}

function slide_move(op) {
	clearInterval(timer);
	var thumbs = $('#slide_thumbs');
	var pos = parseInt( thumbs.css('margin-top') );
	
	if (op == '+') {
		pos += 74;
	} else {
		pos -= 74;
	}
	
	if (pos > 0) pos = 0;
	var total_li = thumbs.find('li').length - 2;
	
	if (pos < -(74 * total_li) ) {
		pos = - total_li * 74;
	}
	
	thumbs.css('margin-top', pos+'px');

}

function slidenext() {
	var slide_img = $('#slide_img');
	var i = parseInt( slide_img.attr('atual') ) + 1;
	
	var thumbs = $('#slide_thumbs');
	var total_li = thumbs.find('li:visible').length;
	
	if (i >= total_li) {
		i = 0;
	}

	slide(i);
	var thumbs = $('#slide_thumbs');
	thumbs.css('margin-top', (-(i*74))+'px');
}

function slidetimer() {
	timer = setInterval("slidenext();", 6000);
}