function ligaCorErro(nomeCampo){
	obj=document.getElementById(nomeCampo);
	if(obj){
		obj.style.backgroundColor="#FF5959";
	}
}

function desligaCorErro(nomeCampo){
	obj=document.getElementById(nomeCampo);
	if(obj){
		obj.style.backgroundColor="#FFFFFF";
	}
}

function validate(form_id,email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      alert('Email inválido.');
      return false;
   }
}