function validateEmail(email){
    if (typeof(email) != "string") {
        return false;
    }
    else 
        if (!email.match(/^[A-Za-z0-9]+([_.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_.-][A-Za-z0-9]+)*\.[A-Za-z0-9]{2,4}$/)) {
            return false;
        }
    return true;
}

function validateUrl(url){
    if (typeof(url) != "string") {
        return false;
    }
    else 
        if (!url.match(/^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/)) {
            return false;
        }
    return true;
}

function validateDate(d, m, a){
    var hj = new Date();
    if (isNaN(d) || isNaN(m) || isNaN(a)) {
        return false;
    }
    if (d <= 0 || m <= 0 || a <= 0) {
        return false;
    }
    if (m > 12) {
        return false;
    }
    if (a.length != 4) {
        return false;
    }
    if (a <= 1900 || a >= hj.getFullYear()) {
        return false;
    }
    if ((m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 || m == 12) && (d > 31)) {
        return false;
    }
    else 
        if ((m == 4 || m == 6 || m == 9 || m == 11) && (d > 30)) {
            return false;
        }
        else 
            if (m == 2 && d > 28 && a % 4 != 0) {
                return false;
            }
            else 
                if (m == 2 && d > 29 && a % 4 == 0) {
                    return false;
                }
    return true;
}

function MaxLenTextArea(max, campo, mostraCont){
    if (mostraCont) {
        var spanCont = document.getElementById('spanContagem');
    }
    var texto = campo.value;
    var cont = max - texto.length;
    if (cont < 0) {
        texto = texto.substr(0, max);
        campo.value = texto;
        cont = max - texto.length;
    }
    if (mostraCont) {
        spanCont.innerHTML = cont;
    }
}

function Redireciona(opcao){
    location.target = '_blank';
    location.href = opcao;
}