var isW3C = (document.getElementById) ? true : false;
var isAll = (document.all) ? true : false;

function checkFeedForm() {
    var elem = (isW3C) ? document.getElementById('feedConditions') : ((isAll) ? document.all['feedConditions'] : null);
    if (elem) {
        if (elem.checked != "") {
			return true;
		} else {
			alert("Debes aceptar las condiciones de uso de los RSS Feeds de eDreams.");
			return false;
		}
    } else {
		return true;
	}
}

function moreFeed(elemValue) {
    var elem = (isW3C) ? document.getElementById('rss-dest') : ((isAll) ? document.all['rss-dest'] : null);
	
	if (elemValue == null) {
		var elemType = (isW3C) ? document.getElementById('rss-type') : ((isAll) ? document.all['rss-type'] : null);
		elemValue = elemType.value;
	}
	
	if (elem) {
		if (elemValue=='vuelos-desde-') {
			showElement(elem);	
		} else {
			hideVisible(elem);
		}
	}
}

function toggleVisibility(elem) {
	if (elem.style.visibility=='hidden') {
		showElement(elem);
	} else {
		hideVisible(elem);
	}
}

function showElement(elem) {
	elem.style.visibility='visible';
}

function hideVisible(elem) {
	elem.style.visibility='hidden';
}