Ext.onReady(function() {
	var fieldEmailNewsletter = document.getElementById('news_email');
	var regexEmail = /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/;

	var fieldBusca = document.getElementById('palavra-chave');

	// newsletter
	fieldEmailNewsletter.onfocus = function() {
		if (!regexEmail.test(this.value)) {
			this.value = '';
		}
	}

	fieldEmailNewsletter.onblur = function() {
		if (!regexEmail.test(this.value)) {
			this.value = 'preencha seu e-mail';
		}
	}

	document.frmAssinarNewsletter.onsubmit = function() {
		return regexEmail.test(fieldEmailNewsletter.value);
	}

	// busca
	fieldBusca.onfocus = function() {
		this.value = '';
	}

	fieldBusca.onblur = function() {
		if (!this.value) {
			this.value = 'digite sua busca';
		}
	}

	document.frmBuscaTopo.onsubmit = function() {
		return (fieldBusca.value != 'digite sua busca');
	}
});