function set_port() {
	var div_cont = document.getElementById("port_middle_left");
	var div_itens = div_cont.getElementsByTagName("div");
	var div_itens_count = 0;
	for(i=0;i<div_itens.length;i++){
		if(div_itens[i].className == "port_middle_left_item"){
			div_itens_count++;
			if(div_itens_count > 12){
				div_itens[i].style.display = "none";
			}
		}
	}
}

function nav_port(page){
	var div_cont = document.getElementById("port_middle_left");
	var div_itens = div_cont.getElementsByTagName("div");
	var div_itens_count = 0;
	var page_atual = 0;
	var page_total = 0;
	for(i=0;i<div_itens.length;i++){
		if(div_itens[i].className == "port_middle_left_item"){
			page_total = i/3
			if(div_itens[i].style.display == "none"){
			} else {
				page_count = i/3;
				page_atual = Math.floor(page_count/12);
			}
		}
	}
	page_total = Math.floor(page_total/12);
	var page_min = 0;
	var page_max = 12*(page_total+1);
	var page_start = 12 * (page_atual + page);
	var page_stop = page_start + 12;
	
	if(page_start < page_min){
		return false;
	}
	if(page_stop > page_max){
		return false;
	}
	
	for(i=0;i<div_itens.length;i++){
		if(div_itens[i].className == "port_middle_left_item"){
			div_itens_count++;
			if((div_itens_count > page_start) && (div_itens_count <= page_stop)){
				div_itens[i].style.display = "block";
			} else {
				div_itens[i].style.display = "none";
			}
		}
	}
}


var imgs = Array();
var imgs_bkp = Array();
imgs[1] = Array("btn_empresa_over.jpg","170","18");
imgs[2] = Array("btn_portifolio_over.jpg","170","18");
imgs[3] = Array("btn_publicacoes_over.jpg","170","18");
imgs[4] = Array("btn_contato_over.jpg","170","18");

function rollover(num){
	var name_img = "btn_" + num;
	var img = document.getElementById(name_img);
	imgs_bkp = Array(img.src,img.width,img.height);
	img.src = "img/" + imgs[num][0];
	img.width = imgs[num][1];
	img.height = imgs[num][2];
}

function rollout(num){
	var name_img = "btn_" + num;
	var img = document.getElementById(name_img);
	img.src = imgs_bkp[0];
	img.width = imgs_bkp[1];
	img.height = imgs_bkp[2];
}

function set_port_img(num){
	var img_mini_name = "port_mini_" + num;
	var img_mini = document.getElementById(img_mini_name);
	var img = document.getElementById("port_img");
	img_mini = img_mini.src;
	img_mini = img_mini.split("/");
	img_mini = img_mini.reverse();
	var img_folder = img_mini[2];
	img_mini = img_mini[0].replace("mini","");
	var img_name = "img/" + img_folder + "/" + img_mini;
	img.src = img_name;
}

var count_banner = 2;
function rotation_banner(){
	var img = document.getElementById("img_banner_home");
	var img_name = "img/home_banner" + count_banner + ".jpg";
	img.src = img_name;
	count_banner++
	if(count_banner>3){
		count_banner = 1;
	}
}
setInterval(rotation_banner,5000);

function click() {
if (event.button==2||event.button==3) {
oncontextmenu='return false';
}
}
document.onmousedown=click
document.oncontextmenu = new Function("return false;")