var onFieldFocus = function()
{
	if($(this).data('dValue') == null)$(this).data('dValue', $(this).val());
	if($(this).val() == $(this).data('dValue'))$(this).val('');
};//onFieldFocus

var onFieldBlur = function()
{
	if($(this).val() == '')$(this).val($(this).data('dValue'));
};//onFieldBlur

var validateEmail = function(address)
{
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   	if(!reg.test(address))return false;
   	return true;
};//validateEmail

var signNewsletter = function()
{
	var email = $('#newsemail').val();
	
	if(email == '' || email == 'Digite seu e-mail aqui.' || !validateEmail(email))return;
	
	callAction(WEB_ROOT + '/default/newsletter', {email:email});
};//signNewsletter

$(document).ready(function(){
	$('.newsemail').focus(onFieldFocus);
	$('.newsemail').blur(onFieldBlur);
	
	$('.btn_signNewsletter').click(signNewsletter);
});