var t = n = count = 0;
$(function() {
    count = $("#play_list a").size();
    $("#play_list a:not(:first-child)").hide();
    $("#play_text li:first-child").css({ "background": "#fff", 'color': '#000' });
    hideAllPlayInfo();
    $("#play_info1").show();
    $("#play_text li").click(function() {
        var i = $(this).text() - 1;
        n = i;
        var j = i + 1;
        if (i >= count) return;
        hideAllPlayInfo();
        $("#play_info" + j).show();
        $("#play_list a").filter(":visible").fadeOut(500).parent().children().eq(i).fadeIn(1000);
        $(this).css({ "background": "#fff", 'color': '#000' }).siblings().css({ "background": "#000", 'color': '#fff' });
    });
    t = setInterval("showAuto()", 4000);
    $("#play").hover(function() { clearInterval(t) }, function() { t = setInterval("showAuto()", 4000); });
})

function showAuto()
{
	n = n >= (count - 1) ? 0 : n + 1;
	$("#play_text li").eq(n).trigger('click');
}

function hideAllPlayInfo() {
    for (var i = 1; i <= count; i++) {
        $("#play_info"+i).hide();
    }
}