var bottomBannerLeftPos = 0;
//var sk = document.getElementById('skaits');
//var skaits = sk.value; 
var bottomBannerImgWidth = 248;


function move_obj_to_bottom() {
    var offset = 0;
    var element = document.getElementById('bottom_banner_div');

    element.style.top = (document.documentElement.scrollTop + (document.documentElement.clientHeight - element.offsetHeight) + offset) + 'px';
	
	document.getElementById('bottom_banner_div').style.width = document.documentElement.clientWidth + "px";
}

function move_banner_to_bottom() {
    var offset = 0; // set offset (likely equal to your css top)
    var element = document.getElementById('bottom_banner_div');

    element.style.top = (document.documentElement.scrollTop + (document.documentElement.clientHeight - element.offsetHeight) + offset) + 'px';
}

function scroll_bottom_banner() {
 var bottomBannerImg = document.getElementById('bottom_banner_img');
 var bottomBannerImg2 = document.getElementById('bottom_banner_img_2');
 var sk = document.getElementById('skaits').value;
 
 if (-bottomBannerLeftPos == bottomBannerImgWidth*sk) {
  bottomBannerLeftPos = 0;
 }
 else {
  bottomBannerLeftPos--;
 }
 
 bottomBannerImg.style.left = bottomBannerLeftPos + "px";
 bottomBannerImg2.style.left = (bottomBannerImgWidth*sk) + bottomBannerLeftPos + "px";
}