function addLoading(div) {
	var divId = document.getElementById(div);
	if (divId) {
		divId.innerHTML = "<img src='_images/loader.gif' border='0'>";
	}
}
function removeLoading(div) {
	var divId = document.getElementById(div);
	if (divId) {
		divId.innerHTML = "";
	}
}
function showHide(div) {
	if ($("#" + div).css("display") == "none" || $("#" + div).css("display") == "") {
		$("#" + div).slideDown('slow');
	} else {
		$("#" + div).slideUp('slow');
	}
}
function validateComment() {
	if ($('#f_nome').val() == '') {
		$('#f_nome').focus();
		alert('Preencha o nome');
		return false;
	} else if ($('#f_email').val() == '' || !isValidEmail($('#f_email').val())) {
		$('#f_email').focus();
		alert('Preencha o e-mail corretamente.');
		return false;
	} else if ($('#f_msg').val() == '') {
		$('#f_msg').focus();
		alert('Preencha a mensagem');
		return false;
	} else {
		addLoading('formLoading');
		return true;
	}
}
function showResponse(responseText, statusText) {
	removeLoading('formLoading');
	alert(responseText); 
}
function isValidEmail(email) {
	var filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
	if (!filter.test(email))
		return false;
	else
		return true;
}
function ow(url, w, h) { //v2.0
	window.open(url,url,'width=' + w + ', height=' + h);
}