Вот держи
Code
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);