Javascript Array toRealignedArray()

Array.prototype.toRealignedArray=function(){//returns a randomly shuffled array
 var clone=this.slice();
 for(i=clone.length-1,tmp=clone[i],target=0;i;tmp=clone[--i]){
  clone[i]=clone[(target=Math.floor(Math.random()*i))];
  clone[target]=tmp;//from   ww w. ja va 2  s  . c om
 }
 return clone;
};