var __g_curNews = 1;
var __g_newsTimer = null;
var __g_timerSpeed = 4000;

function switchHeadline(nId) {

    var obCurNews = document.getById("action_newsn" + __g_curNews);
    var obNews    = document.getById("action_newsn" + nId);

    var obCurImg = document.getById("action_newsb" + __g_curNews);
    var obImg    = document.getById("action_newsb" + nId);

    var obImgCurOff = document.getById("action_newsb" + __g_curNews + "_off");
    var obImgOn     = document.getById("action_newsb" + nId + "_on");

    __g_curNews = nId;

	obCurImg.src = obImgCurOff.src;
	obImg.src    = obImgOn.src;

    obCurNews.style.display = "none";
    obNews.style.display = "block";
}

function switchNextHeadline() {
    var nextId = __g_curNews + 1;
    if (!document.getById("action_newsn" + nextId))
        nextId = 1;
    switchHeadline(nextId);
}

function headlineClicked(nId) {
    if (__g_newsTimer != null) {
        window.clearInterval(__g_newsTimer);
        __g_newsTimer = null;
    }
    switchHeadline(nId);
}

function initNewsTimer() {
	if(document.getById("action_newsn1")){
		__g_newsTimer = window.setInterval(switchNextHeadline, __g_timerSpeed);
	}
}