var homeMallList;
function initializeHomeMall(){
    homeMallList = document.getElementById("malllist");
    homeMallList.speed = 1;
    var malls = homeMallList.getElementsByTagName("td");
    homeMallList.childCount = malls.length;
    homeMallList.onmouseover = function(){
        homeMallList.oldSpeed = homeMallList.speed;
        homeMallList.speed = 0;
    }
    homeMallList.onmouseout = function(){
        homeMallList.speed = homeMallList.oldSpeed;
    }
    var leftbtn = document.getElementById("leftbtn");
    leftbtn.onclick = function(){
        homeMallList.speed = 1;
    }
    var rightbtn = document.getElementById("rightbtn");
    rightbtn.onclick = function(){
        homeMallList.speed = -1;
    }
    mallRolling();
}
function mallRolling(){
    if(homeMallList.rolling)
        clearTimeout(homeMallList.rolling);
    homeMallList.scrollLeft += homeMallList.speed;
    if(homeMallList.speed<0 && homeMallList.scrollLeft==0)
        homeMallList.scrollLeft = (homeMallList.childCount-5)*180;
    else if(homeMallList.speed>0 && homeMallList.scrollLeft==(homeMallList.childCount-5)*180)
        homeMallList.scrollLeft = 0;
    homeMallList.rolling = setTimeout(mallRolling);
}
addFunction(initializeHomeMall);