<code lang="JavaScript">
(function () {                                                                  
    var swapper =                                                               
        function (a,L,e) {                                                      
            var r = Math.floor(Math.random()*L);                                
            var x = a[e];                                                       
            a[e] = a[r];                                                        
            a[r] = x;                                                           
        };                                                                      
    Array.prototype.shuffle =                                                   
        function () {                                                           
            var i,L;                                                            
            i = L = this.length;                                                
            while (i--) swapper(this,L,i);                                      
        };                                                                      
})();

// example

var x = [0,1,2,3,4,5,6,7,8,9];
x.shuffle();
</code>