/* This JaveScript is based on code from www.leigeber.com  

   Modified by Scott Sheen

*/

var menu = function () {
    var t = 15,
        z = 50,
        s = 6,
        a;

    function dd(n) {
        this.n = n;
        this.h = [];
        this.c = []
    }

    dd.prototype.init = function (p, c) {
        a = c;

        var w = document.getElementById(p),
            s = w.getElementsByTagName('ul'),
            l = s.length,
            i = 0;

        for (i; i < l; i++) {
            var h = s[i].parentNode;

            this.h[i] = h;
            this.c[i] = s[i];

            h.onmouseover = new Function(this.n + '.st(' + i + ',true)');
            h.onmouseout = new Function(this.n + '.st(' + i + ')');
        }
    }

    dd.prototype.st = function (x, f) {
        var c = this.c[x],
            h = this.h[x],
            p = h.getElementsByTagName('a')[0];

        clearInterval(c.t);
        c.style.overflow = 'hidden';

        if (f) {
            p.className += ' ' + a;

            if (!c.mh) {
                c.style.display = 'block';
                c.style.height = '';
                c.mh = c.offsetHeight;
                c.style.height = 0;
            }

            if (c.mh == c.offsetHeight) {
                c.style.overflow = 'visible'
            }
            else {
                c.style.zIndex = z;
                z++;
                c.t = setInterval(function () { sl(c, 1) }, t)
            }
        }
        else {
            p.className = p.className.replace(a, '');
            c.t = setInterval(function () { sl(c, -1) }, t)
        }
    }

    function sl(c, f) {
        var h = c.offsetHeight;

        if ((h <= 0 && f != 1) || (h >= c.mh && f == 1)) {
            if (f == 1) {
                c.style.filter = '';
                c.style.opacity = 1;
                c.style.overflow = 'visible'
            }
            clearInterval(c.t);
            return
        }

        var d = (f == 1) ? Math.ceil((c.mh - h) / s) : Math.ceil(h / s),
            o = h / c.mh;

        c.style.opacity = o;
        c.style.filter = 'alpha(opacity=' + (o * 100) + ')';
        c.style.height = h + (d * f) + 'px'
    }
    return { dd: dd }
} ();