JavaScript去除数组里重复值的方法

var unique = function(origArr) {  var newArr = [],    origLen = origArr.length,    found,    x, y;  for ( x = 0; x < origLen; x++ ) {    found = undefined;    for ( y = 0; y < newArr.length; y++ ) {      if ( origArr[x] === newArr[y] ) {       found = true;       break;      }    }    if ( !found) newArr.push( origArr[x] );  }  return newArr;}var myarray = ['jeffrey', 'allie', 'patty', 'damon', 'zach', 'jeffrey', 'allie', 'patty', 'damon', 'zach', 'joe'];myarray = unique(myarray);alert(myarray.join(', '));