var arr1:Array = [1,2,3,4,5,6,7];  
  var arr2:Array=new Array();  
var dlinaMassiva=arr1.length;
  for (var i:int=0; i<dlinaMassiva;i++ )  
  {  
   var rand:int = Math.round(Math.random() * (arr1.length-1));  
    arr2.push(arr1[rand]);  
    arr1.splice(rand,1);    
  }  
  trace(arr2);