$(document).ready(function(){
	$(function() {
		var zIndexNumber = 1000;
		$('div,ul').each(function() {
			$(this).css('zIndex', zIndexNumber);
			zIndexNumber -= 10;
		});
	});

	//Sorteia topo da home
	$("#topo_home").css('background-image','url(img/slides-home/slide'+Math.ceil(5*Math.random())+'.jpg)');

	//Insere topo da página
	if (topo!==undefined) {
		$("#topo").css('background-image','url(img/cabecalhos/'+topo+'.jpg)');
	}
	$('#logo_home .largurasite').css('zIndex', 2000);

	//Mostra - Esconde menus
	$("#lista_menu_mestrado").hide();
	$("#menu_mestrado").hover(
		function () { $("#lista_menu_mestrado").show(); }, 
		function () { $("#lista_menu_mestrado").hide(); }
	);
	$("#lista_menu_curriculos").hide();
	$("#menu_curriculos").hover(
		function () { $("#lista_menu_curriculos").show(); }, 
		function () { $("#lista_menu_curriculos").hide(); }
	);
	
	//Over de botões
	$(".bt_over").hover(
		function(){
			var nm = $(this).attr('src');
			$(this).attr('src',nm.substr(0,nm.length-4)+'-over.png');
		},
		function(){
			var nm = $(this).attr('src');
			if (nm.indexOf('-')>0) {
				$(this).attr('src',nm.substring(0,nm.indexOf('-'))+'.png');
			}
		}
	);
	$('.bt_over').mousedown(function() {
		var nm = $(this).attr('src');
		if (nm.indexOf('-')>-1) {
			$(this).attr('src',nm.substring(0,nm.indexOf('-'))+'-press.png');
		} else {
			$(this).attr('src',nm.substr(0,nm.length-4)+'-press.png');
		}
	});	
	$('.bt_over').mouseup(function() {
		var nm = $(this).attr('src');
		if (nm.indexOf('-')>0) {
			$(this).attr('src',nm.substring(0,nm.indexOf('-'))+'.png');
		}
	});	
	
	//Mostra/esconde texto de input
	var default_values = new Array();
	$(".default_text").focus(function() {
		if (!default_values[this.id]) { default_values[this.id] = this.value; }
		if (this.value == default_values[this.id]) { this.value = ''; }
		$(this).blur(function() {
			if (this.value == '') { this.value = default_values[this.id]; }
		});
	});
	
	//preload images
	jQuery.preLoadImages("img/menu/contato-over.png","img/menu/contato-press.png","img/menu/coppead-over.png","img/menu/coppead-press.png","img/menu/curriculos-over.png","img/menu/curriculos-press.png","img/menu/home-over.png","img/menu/home-press.png","img/menu/links-over.png","img/menu/links-press.png","img/menu/mestrado-over.png","img/menu/mestrado-press.png");	
});

var topo;

(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)