function verificarPreenchimento(strCliente)
{
    if(document.getElementById("txtEmail").value.length > 0)
    {
        if(verificarEmail(document.getElementById("txtEmail").value))
        {
            document.frmNewsletter.submit();
        }
        else
        {
            window.location.href = "#topo";
            showDialog(strCliente,'Preencha corretamente o E-Mail.','warning');
        }
    }
    else
    {
        window.location.href = "#topo";
        showDialog(strCliente,'Obrigatório o preenchimento do E-Mail.','warning');
    }
}

function verificarEmail(strEmail)
{
    var objExclude = /[^@\-\.\w]|^[_@\.\-]|[\._\-]{2}|[@\.]{2}|(@)[^@]*\1/;
    var objCheck = /@[\w\-]+\./;
    var objCheckEnd = /\.[a-zA-Z]{2,3}$/;
    
    if(((strEmail.search(objExclude) != -1) || (strEmail.search(objCheck)) == -1) || (strEmail.search(objCheckEnd) == -1))
        return false;
    else
        return true;
}