//首页

function showbyindex(objindex) {
    var elemet = document.getelementbyid("topdivnav" + objindex).parentnode.parentnode;
    elemet.style.height = "250px";
    elemet.style.position = "absolute";
    elemet.style.backgroundcolor = "#ffffff";
    document.getelementbyid("topdivnav" + objindex).parentnode.style.backgroundcolor = "#f8f8ff";
    document.getelementbyid("topdivnav" + objindex).classname = "topnavnewmouse";
}
function removeshow(objindex) {
    var elemet = document.getelementbyid("topdivnav" + objindex).parentnode.parentnode;
    elemet.style.height = "26px";
    elemet.style.position = "static";
    elemet.style.backgroundcolor = "#ffffff";
    document.getelementbyid("topdivnav" + objindex).classname = "topnavnew";
    document.getelementbyid("topdivnav" + objindex).parentnode.style.backgroundcolor = "";


}
function show1(objindex) {

    var objnav = document.getelementbyid("sec_" + objindex);
    var elemet = document.getelementbyid("topdivnav" + objindex);
    elemet.classname = "topnavnewmouse";
    if (objnav.childnodes.length < 2) {
        return;
    }
    else {

        var rect = offset(elemet);
        var obj = document.getelementbyid("sec_" + objindex);
        var offsetleft = obj.offsetleft || 0;
        var nav = document.getelementbyid("sec_nav");
        nav.style.position = "absolute";
        var browser = navigator.appname;
        if (browser == "netscape") {
            //判断360和ffx
            nav.style.left = (rect.left - offsetleft - 20) + "px";
        }
        else {
            var b_version = navigator.appversion
            var version = b_version.split(";");
            var trim_version = version == null ? "" : version[1].replace(/[ ]/g, "");
            if (browser == "microsoft internet explorer" && trim_version == "msie6.0") {
                nav.style.left = (rect.left - offsetleft) + "px";
            }
            else if (browser == "microsoft internet explorer" && trim_version == "msie7.0") {
                nav.style.left = (rect.left - offsetleft) + "px";
            }
            else if (browser == "microsoft internet explorer" && trim_version == "msie8.0") {
                nav.style.left = (rect.left - offsetleft - 20) + "px";
            }
            else if (browser == "microsoft internet explorer" && trim_version == "msie9.0") {
                nav.style.left = (rect.left - offsetleft - 20) + "px";
            }
            else {
                nav.style.left = (rect.left - offsetleft - 20) + "px";
            }
        }
        nav.style.zindex = 10000;
        obj.style.display = "block";
    }
}
function offset(c) {
    var a = 0, b = 0;
    do {
        a += c.offsettop || 0;
        b += c.offsetleft || 0;
        c = c.offsetparent;
    } while (c);
    return { top: a, left: b };
}
function removeshow1(objindex) {

    var objnav = document.getelementbyid("sec_" + objindex);
    document.getelementbyid("topdivnav" + objindex).classname = "topnavnew";
    document.getelementbyid("sec_" + objindex).style.display = "none";

}

function show(s) {
    document.getelementbyid(s).style.display = "block";
}

function disappear(s) {
    document.getelementbyid(s).style.display = "none";
}


function showp(n, cname) {
    var shawnee = document.getelementbyid("nav").getelementsbytagname("li");
    shawnee[n].classname = cname;

}