Object.extend = function(dest, source, replace) {
    for(prop in source) {
        if(replace == false && dest[prop] != null) continue;
        dest[prop] = source[prop];
    }
    return dest;
}

Object.extend(Function.prototype, {
    apply: function(o, a) {
        var r, x = "__fapply";
        if(typeof o != "object") o = {};
        o[x] = this;
        var s = "r = o." + x + "(";
        for(var i=0; i<a.length; i++) {
            if(i>0) s += ",";
            s += "a[" + i + "]";
        }
        s += ");";
        eval(s);
        delete o[x];
        return r;
    },
    bind: function(o) {
        if(!Function.__objs) {
            Function.__objs = [];
            Function.__funcs = [];
        }

        var objId = o.__oid;
        if(!objId)
            Function.__objs[objId = o.__oid = Function.__objs.length] = o;

        var me = this;
        var funcId = me.__fid;
        if(!funcId)
            Function.__funcs[funcId = me.__fid = Function.__funcs.length] = me;

        if(!o.__closures)
            o.__closures = [];

        var closure = o.__closures[funcId];
        if(closure)
            return closure;

        o = null;
        me = null;

        return Function.__objs[objId].__closures[funcId] = function() {
            return Function.__funcs[funcId].apply(Function.__objs[objId], arguments);
        };
    }
}, false);

Object.extend(Array.prototype, {
    push: function(o) {
        this[this.length] = o;
    },
    addRange: function(items) {
        if(items.length > 0)
            for(var i=0; i<items.length; i++)
                this.push(items[i]);
    },
    clear: function() {
        this.length = 0;
        return this;
    },
    shift: function() {
        if(this.length == 0) return null;
        var o = this[0];
        for(var i=0; i<this.length-1; i++)
            this[i] = this[i + 1];
        this.length--;
        return o;
    }
}, false);

Object.extend(String.prototype, {
    trimLeft: function() {
        return this.replace(/^\s*/,"");
    },
    trimRight: function() {
        return this.replace(/\s*$/,"");
    },
    trim: function() {
        return this.trimRight().trimLeft();
    },
    endsWith: function(s) {
        if(this.length == 0 || this.length < s.length) return false;
        return (this.substr(this.length - s.length) == s);
    },
    startsWith: function(s) {
        if(this.length == 0 || this.length < s.length) return false;
        return (this.substr(0, s.length) == s);
    },
    split: function(c) {
        var a = [];
        if(this.length == 0) return a;
        var p = 0;
        for(var i=0; i<this.length; i++) {
            if(this.charAt(i) == c) {
                a.push(this.substring(p, i));
                p = ++i;
            }
        }
        a.push(s.substr(p));
        return a;
    }
}, false);

Object.extend(String, {
    format: function(s) {
        for(var i=1; i<arguments.length; i++)
            s = s.replace("{" + (i -1) + "}", arguments[i]);
        return s;
    },
    isNullOrEmpty: function(s) {
        if(s == null || s.length == 0)
            return true;
        return false;
    }
}, false);

if(typeof addEvent == "undefined")
    addEvent = function(o, evType, f, capture) {
        if(o == null) return false;
        if(o.addEventListener) {
            o.addEventListener(evType, f, capture);
            return true;
        } else if (o.attachEvent) {
            var r = o.attachEvent("on" + evType, f);
            return r;
        } else {
            try{ o["on" + evType] = f; }catch(e){}
        }
    };
    
if(typeof removeEvent == "undefined")
    removeEvent = function(o, evType, f, capture) {
        if(o == null) return false;
        if(o.removeEventListener) {
            o.removeEventListener(evType, f, capture);
            return true;
        } else if (o.detachEvent) {
            o.detachEvent("on" + evType, f);
        } else {
            try{ o["on" + evType] = function(){}; }catch(e){}
        }
    };