function verificiaContato(){
	var obj = document.cadastro;
	if(obj.nome.value == "") {
		alert('Preencha o campo Nome');
		obj.nome.focus();
		return false;
	}
	else if(obj.email.value == "") {
		alert('Preencha o campo Email');
		obj.email.focus();
		return false;
	}
	else if(obj.email.value.indexOf('@') < 1 ){
		alert('Email incorreto!');
		obj.email.focus();
		return false;
	}else{
		obj.submit();
		}
}