// oferta.js //

var scroll = 0;
var scrollValue = 0;
var scrollrodzaj = 1;
var o_innerWidth = 0;
var gal = document.getElementById("galeria");
var galc = document.getElementById("galContainer");

function scrolldown(i) {
    scroll = 1;
    scrollrodzaj = i;
}
function scrollout() {
    scroll = 0;
}
function startscroll() {
    gal = $("galeria");
    galc = $("galContainer");
    var dcx = window.setInterval("step()", 50);

    if (gal != null) {
        var imags = gal.select('div');
        var img;

        var ll = imags.length;

        if (ll > 0) img = imags[0];

        o_innerWidth = (ll * img.getWidth()) - galc.getWidth();
    }

    scrollValue = 0;
}
function step() {
    if (scroll == 1) {
        gal = $("galeria");
        galc = $("galContainer");

        scrollValue += scrollrodzaj;

        var imags = gal.select('div');
        var img;

        var ll = imags.length;

        if (ll > 0) img = imags[0];

        o_innerWidth = (ll * img.getWidth()) - galc.getWidth();

        if (scrollValue < 0) scrollValue = 0;

        if (scrollValue * 20 > o_innerWidth) {
            if (scrollValue * 20 > img.getWidth()) {
                scrollValue = o_innerWidth / 20;
            } else {
                scrollValue = 0;
            }
        }

        gal.style.marginLeft = -scrollValue * 20 + "px"
    }
}