/* Validate field entry can only be #'s */
function EnsureNumeric() 
{
    var key = window.event.keyCode;

    if (key < 48 || key > 57)
        window.event.returnValue = false;
}


/* Show hoverable tooltip */
var tooltip = function() {
    var id = 'tt';
    var top = 3;
    var left = 3;
    var maxw = 300;
    var speed = 10;
    var timer = 20;
    var endalpha = 95;
    var alpha = 0;
    var tt, t, c, b, h;
    var ie = document.all ? true : false;
    return {
        show: function(v, w) {
            if (tt == null) {
                tt = document.createElement('div');
                tt.setAttribute('id', id);
                t = document.createElement('div');
                t.setAttribute('id', id + 'top');
                c = document.createElement('div');
                c.setAttribute('id', id + 'cont');
                b = document.createElement('div');
                b.setAttribute('id', id + 'bot');
                tt.appendChild(t);
                tt.appendChild(c);
                tt.appendChild(b);
                document.body.appendChild(tt);
                tt.style.opacity = 0;
                tt.style.filter = 'alpha(opacity=0)';
                document.onmousemove = this.pos;
            }
            tt.style.display = 'block';
            c.innerHTML = v;
            tt.style.width = w ? w + 'px' : 'auto';
            if (!w && ie) {
                t.style.display = 'none';
                b.style.display = 'none';
                tt.style.width = tt.offsetWidth;
                t.style.display = 'block';
                b.style.display = 'block';
            }
            if (tt.offsetWidth > maxw) { tt.style.width = maxw + 'px' }
            h = parseInt(tt.offsetHeight) + top;
            clearInterval(tt.timer);
            tt.timer = setInterval(function() { tooltip.fade(1) }, timer);
        },
        pos: function(e) {
            var u = ie ? event.clientY + document.documentElement.scrollTop : e.pageY;
            var l = ie ? event.clientX + document.documentElement.scrollLeft : e.pageX;
            tt.style.top = (u - h) + 'px';
            tt.style.left = (l + left) + 'px';
        },
        fade: function(d) {
            var a = alpha;
            if ((a != endalpha && d == 1) || (a != 0 && d == -1)) {
                var i = speed;
                if (endalpha - a < speed && d == 1) {
                    i = endalpha - a;
                } else if (alpha < speed && d == -1) {
                    i = a;
                }
                alpha = a + (i * d);
                tt.style.opacity = alpha * .01;
                tt.style.filter = 'alpha(opacity=' + alpha + ')';
            } else {
                clearInterval(tt.timer);
                if (d == -1) { tt.style.display = 'none' }
            }
        },
        hide: function() {
            clearInterval(tt.timer);
            tt.timer = setInterval(function() { tooltip.fade(-1) }, timer);
        }
    };
} ();



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 }
} ();