//******************************************************//

function confere_email(formulario) {
var valido = formulario.value.match(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/);
if (valido) {
   return true;
} else {
   return false;
   }
}

//******************************************************//

function confere(formulario) {
if (formulario.value=="") {
	return false;
}
else {
return true;
}
}

//******************************************************//
function cadastrar_newsletter(){  
   
		if (confere_email(document.form_newsletter.email)) 
		{
			
					document.form_newsletter.submit()
					document.form_newsletter.reset()
				
		}
		else 
		{
			alert('Please enter a valid e-mail!')
		}
   		  	 
}	

//******************************************************//
function deletar_newsletter(){  
   
		if (confere_email(document.form_newsletter.email)) 
		{
			
					document.form_newsletter.action = 'deleta_newsletter.php';
					document.form_newsletter.submit()
					document.form_newsletter.reset()
				
		}
		else 
		{
			alert('Please enter a valid e-mail!')
		}
   		  	 
}	
//******************************************************//