js数组去重

function deleteRepeat(){//删除重复的

               var _arr=[1,1,1,3,3,3,5,8,8,9,10];

               //console.log(_arr);

               for(var i=0;i<_arr.length;i++){

                    for(var n=i+1;n<_arr.length;n++){

                         if(_arr[i]==_arr[n]){

                              _arr.splice(n,1);

                              n--;

                         }

                    }

               }

               console.log(_arr);

          }

          deleteRepeat();