function pergunta(obj) {
	var el = document.getElementById(obj);
	if ( el.style.display != 'none' ) {
		el.style.display = 'none';
		}
		else {
		el.style.display = '';
		}
	}

function onclick_faleconosco()
{
    if(document.getElementById("txtNome").value == "" || document.getElementById("txtNome").value == null || document.getElementById("txtNome").value == "Nome")
    {
        alert("Por favor digite o seu nome.");
        return false;
    }
    
    if(document.getElementById("txtEmail").value == "" || document.getElementById("txtEmail").value == null || document.getElementById("txtEmail").value == "E-mail")
    {
        alert("Por favor digite o seu e-mail.");
        return false;
    }else
    {
        Email = validarEmail(document.getElementById("txtEmail").value)
        if(Email == false)
        {
            alert("E-mail Invalido.");
            return false;
        }
    }
    
    if(document.getElementById("ctl00_ContentPlaceHolder1_IdFaleconosco_assunto").value == "0")
    {
        alert("Por favor selecione o assunto.");
        return false;
    }
    
    if(document.getElementById("txtMensagem").value == "" || document.getElementById("txtMensagem").value == null)
    {
        alert("Por favor digite sua mensagem.");
        return false;
    }
    
    document.getElementById("ClickEnviar").value = "ok";
    document.forms[0].submit();
}

function validarEmail(email)
{
    reEmail1 = /^[\w!#$%&'*+\/=?^`{|}~-]+(\.[\w!#$%&'*+\/=?^`{|}~-]+)*@(([\w-]+\.)+[A-Za-z]{2,6}|\[\d{1,3}(\.\d{1,3}){3}\])$/;
    reEmail2 = /^[\w-]+(\.[\w-]+)*@(([\w-]{2,63}\.)+[A-Za-z]{2,6}|\[\d{1,3}(\.\d{1,3}){3}\])$/;
    reEmail3 = /^[\w-]+(\.[\w-]+)*@(([A-Za-z\d][A-Za-z\d-]{0,61}[A-Za-z\d]\.)+[A-Za-z]{2,6}|\[\d{1,3}(\.\d{1,3}){3}\])$/;
    reEmail = reEmail3;
    
    if(reEmail.test(email))
	{
	    return true;
	}else if (email != null && email != "")
	{
		return false;
	}
}