/* To manipulate img in a zone */
silsilNewWidth = 0;
silINIT = false;
var timeoutamim;
var timeoutautoscroll;
silPOS = 0;
numberofdiapos = 0;
lastDiapo = 1;
moving = false;
direction = "up";

/* Start scrolling */
function startscrolling(numDiapo) {
    UpdatesilNewWidth();
    value = 20;
    cran = numDiapo - 1;
    stop = (cran * silNewWidth);
    if (lastDiapo > numDiapo) {
        value = -value;
        cran = numDiapo - 1;
    }
    document.getElementById("idNewsWindow").scrollLeft += value;
    silPOS += value;
    if ((lastDiapo < numDiapo && silPOS >= stop)
	        || (lastDiapo > numDiapo && silPOS <= stop)) {
        clearInterval(timeoutamim);
        updatenavigation(numDiapo);
        lastDiapo = numDiapo;
        moving = false;
        timeoutautoscroll = setInterval(function () { AutoScroll(); }, 10000);
    }
}
/* Ask to scroll */
function Scroll(numdiapo) {

    clearInterval(timeoutautoscroll);
    if (!silINIT) { Initialize(); }
    if (numdiapo != lastDiapo && !moving && numberofdiapos>1) {
        moving = true;
        timeoutamim = setInterval(function () { startscrolling(numdiapo); }, 20);
    }
}
/* silINIT to be able to scroll */
function Initialize() {
    UpdatesilNewWidth();
    silINIT = true;
    updatenavigation(1);
}
/* Calculation Newwith */
function UpdatesilNewWidth() {
    try {

        if (document.getElementById("idNewsWindow").children[0]) {
            silNewWidth = parseInt(document.getElementById("idNewsWindow").children[0].width)
            numberofdiapos = parseInt(document.getElementById("idNewsWindow").children.length);
        }
        else {
            silNewWidth = parseInt(document.getElementById("idNewsWindow").childNodes[0].width)
            numberofdiapos = parseInt(document.getElementById("idNewsWindow").childNodes.length);
        }
    }
    catch (err) { ; }

}
/* start autoscroll */
function AutoScroll() {
    if (!moving) {
            if (!silINIT) { Initialize(); }
        if (numberofdiapos > 1) {
            clearInterval(timeoutautoscroll);
            if (lastDiapo == numberofdiapos) {
                direction = "down";
            }
            if (lastDiapo == 1) {
                direction = "up";
            }
            if (direction == "up") {
                Scroll(lastDiapo + 1);
            }
            if (direction == "down") {
                Scroll(lastDiapo - 1);
            }
        }
    }
}

/* update navigation buttons */
function updatenavigation(numdiapo) {

    if (document.getElementById("idNewsControls").children[0]) {
        if (lastDiapo > 1) { document.getElementById("idNewsControls").children[lastDiapo - 1].style.border = "none"; }
        if (numdiapo > 1) { document.getElementById("idNewsControls").children[numdiapo - 1].style.border = "1px solid gray"; }
    }
    else {
        if (lastDiapo > 1) { document.getElementById("idNewsControls").childNodes[lastDiapo - 1].style.border = "none"; }
        if (numdiapo > 1) {document.getElementById("idNewsControls").childNodes[numdiapo - 1].style.border = "1px solid gray";}

    }
    
    
}