var _offerSlideImgs = 0;
var _offerSlideCrnt = 0;
var _offerSlideInterval = null;

$(window).load(function () {
    for (var i = 0; i < 5; i++) {
        if ($('#slider-'+i).length>0) {
            _offerSlideImgs++;
        }
    }
    
    var interval = 5000;
   
    if ($('#slider-interval-inp').length > 0) {
        interval = $('#slider-interval-inp')[0].value;
    }
            
    if (_offerSlideImgs>1) {
        _offerSlideInterval = setInterval('slideOffer('+interval+')', interval);
    }
});

function slideOffer(interval)
{
    /*_offerSlideCrnt++;
    if (_offerSlideCrnt==_offerSlideImgs) {
        _offerSlideCrnt = 0;
    }
    console.log(_offerSlideCrnt);*/
    
    if (interval<1300) {
        interval = interval - 100;
    } else {
        interval = 1200;
    }
    
    for (var i = 0; i < 5; i++) {
        $('#slider-'+i).each(function () {
            this.style.zIndex++;
            if (this.style.zIndex>8) {
                this.style.zIndex = 9-_offerSlideImgs;
                $(this).show();
            } else if (this.style.zIndex==8) {
                $(this).fadeOut(interval);
            }
        });
    }
}