function carrega_menu() {
strURL='menu-heade.php';
 var xmlHttpReq = false;
    var self = this;
    // Mozilla/Safari
    if (window.XMLHttpRequest) {
        self.xmlHttpReq = new XMLHttpRequest();
    }
    // IE
    else if (window.ActiveXObject) {
        self.xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
    }
    self.xmlHttpReq.open('POST', strURL, true);
    self.xmlHttpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    self.xmlHttpReq.onreadystatechange = function() {
        if (self.xmlHttpReq.readyState == 4) {
            updatepage(self.xmlHttpReq.responseText);
        }
    }
    self.xmlHttpReq.send(getquerystring());
}

function getquerystring() {
  
    qstr = 'cmd=' + escape('get');  // NOTE: no '?' before querystring
    return qstr;
}

function updatepage(str){
    document.getElementById("teste").innerHTML = str;
}
function addFav(){
    var url      = "http://www.receitasecia.com";
    var title    = "Receitas & Cia - As Melhores Receitas";
    if (window.sidebar) window.sidebar.addPanel(title, url,"");
    else if(window.opera && window.print){
        var mbm = document.createElement('a');
        mbm.setAttribute('rel','sidebar');
        mbm.setAttribute('href',url);
        mbm.setAttribute('title',title);
        mbm.click();
    }
    else if(document.all){window.external.AddFavorite(url, title);}
}


function checar(form) {
if (form.tabela.value=="0") { alert('Por favor, selecione uma Categoria'); form.tabela.focus(); return false;}
if (form.valor.value.length < 4 ) { alert('digite ao menos 4 caracteres para a busca'); form.valor.focus(); return false;}

}

function validar_formulario_login(form_id) {
    var login = document.getElementById('username').value;
    var senha = document.getElementById('senha').value;
    var msg = '';
    if (login == '') {
        msg += 'Você deve digitar o login.\n';
    }

    if (senha == '') {
        msg += 'Você deve digitar a senha.';
    }

    if (msg != '') {
        alert(msg);
    } else {
        document.getElementById(form_id).submit();
    }

    return;
}