var boardNum = 0;
    var boardSpeed = 3000;

    var billboard = new Array();
    billboard[0] = new Image();
    billboard[0].src = "/v2/images/1.png";
    billboard[0].style.marginLeft = "30px";
    billboard[1] = new Image();
    billboard[1].src = "/v2/images/2.png";
    billboard[1].style.marginLeft = "30px";
    billboard[2] = new Image();
    billboard[2].src = "/v2/images/3.png";
    billboard[2].style.marginLeft = "163px";

function rotateBoard() {
    if (boardNum < (billboard.length - 1)) {
         boardNum++;
    }
    else {
        boardNum = 0;
    }
    document.billboard.src = billboard[boardNum].src;
    document.billboard.style.marginLeft = billboard[boardNum].style.marginLeft;
    setTimeout('rotateBoard()', boardSpeed);
}

function startBB() {
 setTimeout('rotateBoard()', boardSpeed);
}