function validaEmail() {
		document.senha.email.style.background="";

	if (document.senha.email.value == "" ||
		document.senha.email.value.indexOf('@',0) == -1) {
		document.senha.email.style.background="#fffdca";
		document.getElementById("ok").style.display="none";
		document.getElementById("erro").style.display="block";
	}else{
		document.senha.email.value="";
		document.senha.email.style.background="";
		document.getElementById("erro").style.display="none";
		document.getElementById("bt_enviar").style.display="none";
		document.getElementById("email").style.display="none";
		document.getElementById("label").style.display="none";
		document.getElementById("bt_ok").style.display="block";
		document.getElementById("ok").style.display="block";
	}

}