var timeout2 = 1000;  //切换时间
var timeout3 = 1000; //mouse over 后切换时间
var now_content = 0;
var total_content = 5;
var way = 1;
var start_content = Math.round(Math.random() * (total_content - 1)) + 1; //除广告为第一显示外
function content_mouse(num) {
    now_content = num;
    window.clearInterval(theTimer2);
    for (var i = 1; i <= total_content; i++) {
        document.getElementById('divhl0' + i).style.display = 'none';
        document.getElementById('small0' + i).style.display = 'block';
    }
    document.getElementById('divhl0' + num).style.display = 'block';
    document.getElementById('small0' + num).style.display = 'none';
    theTimer2 = setTimeout('change_content()', timeout3);
}





function change_content() {

    for (var i = 1; i <= total_content; i++) {
        document.getElementById('divhl0' + i).style.display = 'none';
        document.getElementById('small0' + i).style.display = 'block';
    }
    document.getElementById('divhl0' + now_content).style.display = 'block';
    document.getElementById('small0' + now_content).style.display = 'none';
    if (way) now_content++;
    else now_content--;
    if (now_content > total_content) { now_content = total_content - 1; way = 0; }
    else if (now_content == 0) { now_content = 1; way = 1; }
    theTimer2 = setTimeout('change_content()', timeout2);
}
theTimer2 = setTimeout(function() { now_content = 1; change_content(); }, timeout2);