// JavaScript Document
function $f(element) {
    return element = document.getElementById(element);
}
function $fD() {
    var d = $f('class1content');
    var h = d.offsetHeight;
    var maxh = 300;
    function dmove() {
        h += 50; //设置层展开的速度
        if (h >= maxh) {
            d.style.height = '148px';
            clearInterval(iIntervalId);
        } else {
            d.style.display = 'block';
            d.style.height = h + 'px';
        }
    }
    iIntervalId = setInterval(dmove, 2);
}
function $fD2() {
    var d = $f('class1content');
    var h = d.offsetHeight;
    var maxh = 300;
    function dmove() {
        h -= 50; //设置层收缩的速度
        if (h <= 0) {
            d.style.display = 'none';
            clearInterval(iIntervalId);
        } else {
            d.style.height = h + 'px';
        }
    }
    iIntervalId = setInterval(dmove, 2);
}
function $fuse(targetid, objN) {
    var d = $f(targetid);
    var sb = $f(objN);
    if (d.style.display == "block") {
        $fD2();
        d.style.display = "none";
        sb.innerHTML = "登录";
    } else {
        $fD();
        d.style.display = "block";
        sb.innerHTML = '登录';
    }
}