var B = BigNews = {
    current: 0,
    next: 0,
    scrollInterval: 0,
    autoScroller: 0
};
BigNews.turn = function(index, obj) {
    clearInterval(BigNews.autoScroller);
    BigNews.scroll(index, obj);
}
BigNews.scroll = function(index, obj) {
    if (obj.smallpic == null || obj.smallpic == "") {
        clearInterval(BigNews.autoScroller);
        return;
    }
    var count = 0;
    var step = obj.step;
    var duration = 16;
    var b = BigNews;
    b.next = index;
    if (index != b.current && count > duration / 8) {
        return;
    }
    clearInterval(b.scrollInterval);
    for (var i = 0; i < obj.totalcount; i++) {
        $(obj.smallpic + "_" + i).className = '';
        if (obj.pictxt != null && obj.pictxt != "")
            $(obj.pictxt + "_" + i).style.display = "none";
    }
    $(obj.smallpic + "_" + index).className = obj.selectstyle;
    if (obj.pictxt != null && obj.pictxt != "")
        $(obj.pictxt + "_" + index).style.display = "block";
    var span = index - b.current;
    var begin_value = $(obj.bigpic).scrollTop;
    var chang_in_value = span * step + (b.current * step - begin_value);
    b.scrollInterval = setInterval(function() { doit(begin_value, chang_in_value) }, 10);
    function doit(b, c) {
        $(obj.bigpic).scrollTop = cpu(count, b, c, duration);
        count++;
        if (count == duration) {
            clearInterval(BigNews.scrollInterval);
            scrollInterval = 0;
            count = 0;
            $(obj.bigpic).scrollTop = b + c;
            BigNews.current = index;
        }
    }
    function cpu(t, b, c, d) { return c * ((t = t / d - 1) * t * t + 1) + b; };
}
BigNews.auto = function(obj) {
    clearInterval(BigNews.autoScroller);
    BigNews.autoScroller = setInterval(function() {
        BigNews.scroll(BigNews.current == (obj.totalcount - 1) ? 0 : BigNews.current + 1, obj);
    }, obj.autotimeintval);
}
BigNews.pauseSwitch = function() {
    clearTimeout(BigNews.autoScroller);
}
BigNews.init = function(obj) {
    $(obj.bigpic).onmouseover = new Function("BigNews.pauseSwitch();");
    $(obj.bigpic).onmouseout = new Function("BigNews.auto(" + obj.objname + ");");
    for (i = 0; i < obj.totalcount; i++) {
        if (obj.smallpic != null && obj.smallpic != "") {
            $(obj.smallpic + "_" + i).onmouseover = new Function("BigNews.turn(" + i + "," + obj.objname + ");BigNews.pauseSwitch();");
            $(obj.smallpic + "_" + i).onmouseout = new Function("BigNews.auto(" + obj.objname + ");");
        }
    }
    BigNews.auto(obj);
}