$(document).ready(function(){
   $('table.tabela_comum tr:odd').addClass('bg');
});

function enviar(){
	if (document.getElementById("newsletter").value.length==0){
		alert('Informe seu E-mail.');
		document.getElementById("newsletter").focus();
		return false;
	}	
}

function replaceAll(string, token, newtoken) {
	while (string.indexOf(token) != -1) {
 		string = string.replace(token, newtoken);
	}
	return string;
}

function validateEmail(email) {
	var at = email.lastIndexOf("@");

	// Make sure the at (@) sybmol exists and  
	// it is not the first or last character
	if (at < 1 || (at + 1) === email.length)
		return false;

	// Make sure there aren't multiple periods together
	if (/(\.{2,})/.test(email))
		return false;

	// Break up the local and domain portions
	var local = email.substring(0, at);
	var domain = email.substring(at + 1);

	// Check lengths
	if (local.length < 1 || local.length > 64 || domain.length < 4 || domain.length > 255)
		return false;

	// Make sure local and domain don't start with or end with a period
	if (/(^\.|\.$)/.test(local) || /(^\.|\.$)/.test(domain))
		return false;

	// Check for quoted-string addresses
	// Since almost anything is allowed in a quoted-string address,
	// we're just going to let them go through
	if (!/^"(.+)"$/.test(local)) {
		// It's a dot-string address...check for valid characters
		if (!/^[-a-zA-Z0-9!#$%*\/?|^{}`~&'+=_\.]*$/.test(local))
			return false;
	}

	// Make sure domain contains only valid characters and at least one period
	if (!/^[-a-zA-Z0-9\.]*$/.test(domain) || domain.indexOf(".") === -1)
		return false;	

	return true;
}