JavaScript array shuffle

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/**  * @function  * @param {Boolean} $new Need a new array or shuffle this.  * @return {Array}  * @see http://www.hardcode.nl/subcategory_1/article_317-array-shuffle-function.htm  * @see http://yelotofu.com/2008/08/jquery-shuffle-plugin/  * @author Alexey Bass (albass)  */ Array.prototype.shuffle = function($new) {     $new = $new || false;           var $a = !$new ? this : this.slice()     ,   $len = $a.length, $i = $len     ,   $p, $t;           while ($i--) {         $p = parseInt(Math.random() * $len);         $t = $a[$i], $a[$i] = $a[$p], $a[$p] = $t;     }           return $a; };

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