function mostrarCategorias() {
	var idCanal = $("canal").value;
	simple_ajax("ajaxLlenarComboCategorias.asp", "GET", "id=" + idCanal + "&d=" + (new Date()));
}

function mostrarSubCategorias() {
	var idCat = $("fcat").value;
	simple_ajax("ajaxLlenarComboSubCategorias.asp", "GET", "id=" + idCat + "&d=" + (new Date()));
}

function Comportamientos() {
	if($("fcat")) {
		listen('change', 'canal', mostrarCategorias);
	 	listen('change', 'fcat', mostrarSubCategorias);
	}
}


function emptyObjCmb(obj){
	for (i=0; i < obj.length; i++) {
		obj.options[i] = null;
	}
	obj.options.length = 0;
}