window.log = function(){
    log.history = log.history || [];  
    log.history.push(arguments);
    arguments.callee = arguments.callee.caller;  
    if(this.console) console.log( Array.prototype.slice.call(arguments) );
};
(function(b){function c(){}for(var d="assert,count,debug,dir,dirxml,error,exception,group,groupCollapsed,groupEnd,info,log,markTimeline,profile,profileEnd,time,timeEnd,trace,warn".split(","),a;a=d.pop();)b[a]=b[a]||c})(window.console=window.console||{});

if (!Array.prototype.forEach) {
    Array.prototype.forEach = function(fun /*, thisp*/)
    {
        var len = this.length;
        if (typeof fun != "function")
            throw new TypeError();

        var thisp = arguments[1];
        for (var i = 0; i < len; i++)
        {
            if (i in this)
                fun.call(thisp, this[i], i, this);
        }
    };
}

if (!Array.prototype.shuffle) {
    Array.prototype.shuffle = function() {
        var s = [];
        while (this.length) s.push(this.splice(Math.random() * this.length, 1)[0]);
        while (s.length) this.push(s.pop());
        return this;
    }
}