var ret;
if (!Array.prototype.push) {
    Array.prototype.push = function(obj) {
        for (var i = 0; i < arguments.length; i++) {
            this[this.length] = arguments[i];
        }
        return this.length;
    }
}
if (!Array.prototype.shift) {
    Array.prototype.shift = function() {
        var result = this[0];
        for (var i = 0; i < this.length - 1; i++) {
            this[i] = this[i + 1];
        }
        this.length--;
        return result;
    }
}
if (!Array.prototype.unshift) {
    Array.prototype.unshift = function() {
        this.reverse();
        for (var i = arguments.length - 1; i >= 0; i--) {
            this[this.length] = arguments[i]
        }
        this.reverse();
        return this.length;
    }
}
if (!Array.prototype.pop) {
    Array.prototype.pop = function() {
        lastElement = this[this.length - 1];
        this.length = Math.max(this.length - 1, 0);
        return lastElement;
    }
}
Object.extend = function(destination, source) {
    for (property in source) {
        destination[property] = source[property];
    }
    return destination;
}
function $() {
    var elements = new Array();
    for (var i = 0; i < arguments.length; i++) {
        var element = arguments[i];
        if (typeof element == 'string') element = document.getElementById(element);
        if (arguments.length == 1) return element;
        elements.push(element);
    }
    return elements;
}
function getElementsByClassName(strClass, strTag, objContElm) {
    strTag = strTag || "*";
    objContElm = objContElm || document;
    var objColl = (strTag == '*' && document.all) ? document.all: objContElm.getElementsByTagName(strTag);
    var arr = new Array();
    var delim = strClass.indexOf('|') != -1 ? '|': ' ';
    var arrClass = strClass.split(delim);
    if (objColl.length) {
        for (i = 0, j = objColl.length; i < j; i++) {
            if (objColl[i].className) {
                var arrObjClass = objColl[i].className.split(' ');
                if (delim == ' ' && arrClass.length > arrObjClass.length) continue;
                var c = 0;
                comparisonLoop: for (k = 0, l = arrObjClass.length; k < l; k++) {
                    for (m = 0, n = arrClass.length; m < n; m++) {
                        if (arrClass[m] == arrObjClass[k]) c++;
                        if ((delim == '|' && c == 1) || (delim == ' ' && c == arrClass.length)) {
                            arr.push(objColl[i]);
                            break comparisonLoop;
                        }
                    }
                }
            }
        }
    }
    return arr;
}
function addEvent(elm, evType, fn, useCapture) {
    if (elm.addEventListener) {
        elm.addEventListener(evType, fn, useCapture);
        return true;
    } else if (elm.attachEvent) {
        var r = elm.attachEvent('on' + evType, fn);
        EventCache.add(elm, evType, fn);
        return r;
    } else {
        elm['on' + evType] = fn;
    }
}
var EventCache = function() {
    var listEvents = [];
    return {
        listEvents: listEvents,
        add: function(node, sEventName, fHandler, bCapture) {
            listEvents.push(arguments);
        },
        flush: function() {
            var i, item;
            for (i = listEvents.length - 1; i >= 0; i = i - 1) {
                item = listEvents[i];
                if (item[0].removeEventListener) {
                    item[0].removeEventListener(item[1], item[2], item[3]);
                }
                if (item[1].substring(0, 2) != "on") {
                    item[1] = "on" + item[1];
                }
                if (item[0].detachEvent) {
                    item[0].detachEvent(item[1], item[2]);
                }
                item[0][item[1]] = null;
            }
        }
    };
} ();
addEvent(window, 'unload', EventCache.flush, false);

/*
var LoadEvents = new Array();
function pushLoadEvent(func) {
    LoadEvents.push(func);
}
function LoadEventsStart() {
    for (var i = 0; i < LoadEvents.length; i++) {
        LoadEvents[i]();
    }
}
addEvent(window, 'load', LoadEventsStart, false);
*/