//util functions


Array.prototype.unique = function () {
	var r = new Array();
	o:for(var i = 0, n = this.length; i < n; i++)
	{
		for(var x = 0, y = r.length; x < y; x++)
		{
			if(r[x]==this[i])
			{
				continue o;
			}
		}
		r[r.length] = this[i];
	}
	return r;
}

Array.prototype.shuffle = function( b ) {

	var i = this.length, j, t;

	while( i ) {
		j = Math.floor( ( i-- ) * Math.random() );
		t = b && typeof this[i].shuffle!=='undefined' ? this[i].shuffle() : this[i];
  		this[i] = this[j];
  		this[j] = t;
	}

	return this;

};