function carregando(flag) {
	var objWait = 'showWait';
	var element = $(objWait);
	
	if ((element == null || element == 'undefined')) {
		var body = document.getElementsByTagName('body')[0];		
		element = Builder.node('div',{id:'showWait'},[Builder.node('p',{className:'txt_wait'},'Aguarde...')]);
		body.appendChild(element);
	}
	
	if (flag) {
		Effect.Center(objWait);
		element.style.display = "block";
	} else {
		element.style.display = "none";
	}
}