function getDomain() {
    var host = document.location.hostname;
    var segments = host.split(".");
    var domain = "";

    //eg:xxx.com
    if (segments.length <= 2) { return host; }

    for (var i = 0; i < segments.length; i++) {
        if (host.indexOf("com.cn") > 0) {
            //eg,www.xxx.com.cn,www.abc.xxx.com.cn
            if (i >= (segments.length - 3)) { domain += "." + segments[i]; }
        }
        else {
            //eg,www.xxx.com,www.abc.xxx.com
            if (i >= (segments.length - 2)) { domain += "." + segments[i]; }
        }
    }

    //去除"."
    if (domain.indexOf(".") == 0) { domain = domain.substring(1); }
    return domain;
}

function initLogo() {
    //modify maliang 20100303
    //document.write('<a href="\/"><IMG src="\/images\/logo\/16bm_n.gif" border=0 alt="我傲分类"></a>');
    document.write('<a href="\/"><IMG src="\/images\/logo\/' + getDomain().split(".")[0] + '_n.gif" border=0 alt="分类中国"></a>');
}

function checksearch(form) {
    if (form.area1.value == "0") { alert('必须选择一个大类进行查询'); form.area1.focus(); return false; }
    else {
        var key = form.keyword.value;
        if (key == '输入关键词') key = '';
        var url = '/search/' + form.area1.value + '-0-11-0-1' + ((key == '') ? '' : '-' + escape(escape(key)));
        form.action = url;
        form.submit();
    }
}

function clearWord(obj) { obj.value = ""; }