var miniTab = {
        currentTab:     0,
        activeTab:      0,
        destX:          0,
        destW:          0,
        t:              0,
        b:              0,
        c:              0,
        d:              20,
        animInterval:   null,
        sliderObj:      null,
        aHeight:        0,
        ul:             [],
        liArr:          [],
        aArr:           [],
        
        init: function() {
                if(!document.getElementById || !document.getElementById("miniflex")) return;

                miniTab.ul          = document.getElementById("miniflex");
                miniTab.liArr       = miniTab.ul.getElementsByTagName("li");
                miniTab.aArr        = miniTab.ul.getElementsByTagName("a");

                for(var i = 0, li; li = miniTab.liArr[i]; i++) {
                        li.onmouseover = miniTab.aArr[i].onfocus = function(e) {
                                var pos = 0;
                                var elem = this.nodeName == "LI" ? this : this.parentNode;
                                while(elem.previousSibling) {
                                        elem = elem.previousSibling;
                                        if(elem.tagName && elem.tagName == "LI") pos++;

                                }
                                miniTab.initSlide(pos);
                        }
                }

                miniTab.ul.onmouseout = function(e) {
                        miniTab.initSlide(miniTab.currentTab);
                };

                for(var i = 0, a; a = miniTab.aArr[i]; i++) {
                        if(a.className.search("active") != -1) {
                                miniTab.activeTab = miniTab.currentTab = i;
                        }
                        a.style.borderBottom  = "0px";
                        a.style.paddingBottom = "6px";
                }

                miniTab.slideObj                = miniTab.ul.parentNode.appendChild(document.createElement("div"));
                miniTab.slideObj.appendChild(document.createTextNode(String.fromCharCode(160)));
                miniTab.slideObj.id             = "animated-tab";
                miniTab.slideObj.style.top      = (miniTab.ul.offsetTop + miniTab.liArr[miniTab.activeTab].offsetTop + miniTab.aArr[miniTab.activeTab].offsetTop) + "px";
                miniTab.slideObj.style.left     = (miniTab.ul.offsetLeft + miniTab.liArr[miniTab.activeTab].offsetLeft + miniTab.aArr[miniTab.activeTab].offsetLeft) + "px";
                miniTab.slideObj.style.width    = miniTab.aArr[miniTab.activeTab].offsetWidth + "px";
                miniTab.aHeight                 = miniTab.ul.offsetTop + miniTab.liArr[miniTab.activeTab].offsetTop + miniTab.aArr[miniTab.activeTab].offsetTop;

                miniTab.initSlide(miniTab.activeTab, true);

                var intervalMethod = function() { miniTab.slideIt(); }
                miniTab.animInterval = setInterval(intervalMethod,10);
        },

        cleanUp: function() {
                clearInterval(miniTab.animInterval);
                miniTab.animInterval = null;
        },

        initSlide: function(pos, force) {
                if(!force && pos == miniTab.activeTab) return;
                miniTab.activeTab = pos;
                miniTab.initAnim();
        },

        initAnim: function() {

                miniTab.destX = parseInt(miniTab.liArr[miniTab.activeTab].offsetLeft + miniTab.liArr[miniTab.activeTab].getElementsByTagName("a")[0].offsetLeft + miniTab.ul.offsetLeft);
                miniTab.destW = parseInt(miniTab.liArr[miniTab.activeTab].getElementsByTagName("a")[0].offsetWidth);
                miniTab.t = 0;
                miniTab.b = miniTab.slideObj.offsetLeft;
                miniTab.c = miniTab.destX - miniTab.b;

                miniTab.bW = miniTab.slideObj.offsetWidth;
                miniTab.cW = miniTab.destW - miniTab.bW;

                miniTab.slideObj.style.top = (miniTab.ul.offsetTop + miniTab.liArr[miniTab.activeTab].offsetTop + miniTab.aArr[miniTab.activeTab].offsetTop) + "px";
        },

        slideIt:function() {

                // Has the browser text size changed?
                if(miniTab.aHeight != miniTab.ul.offsetTop + miniTab.liArr[miniTab.activeTab].offsetTop + miniTab.aArr[miniTab.activeTab].offsetTop) {
                        miniTab.initAnim();
                        miniTab.aHeight = miniTab.ul.offsetTop + miniTab.liArr[miniTab.activeTab].offsetTop + miniTab.aArr[miniTab.activeTab].offsetTop
                };

                if(miniTab.t++ < miniTab.d) {
                        var x = miniTab.animate(miniTab.t,miniTab.b,miniTab.c,miniTab.d);
                        var w = miniTab.animate(miniTab.t,miniTab.bW,miniTab.cW,miniTab.d);

                        miniTab.slideObj.style.left = parseInt(x) + "px";
                        miniTab.slideObj.style.width = parseInt(w) + "px";
                } else {
                        miniTab.slideObj.style.left = miniTab.destX + "px";
                        miniTab.slideObj.style.width = miniTab.destW +"px";
                }
        },

        animate: function(t,b,c,d) {
                if ((t/=d/2) < 1) return c/2*t*t + b;
                return -c/2 * ((--t)*(t-2) - 1) + b;
        }
}

window.onload = miniTab.init;
window.onunload = miniTab.cleanUp;