数组去重

     // 数组去重
     function distinct(temp){
     // Array.prototype.distinct = function(){
         var ar = temp;
             obj = {};
             len = ar.length;
             newArr = [];
             i = 0;    
         for(i;i<len;i++){
             if(!obj[ar[i]]){
                 obj[ar[i]] = "abc";
                 newArr.push(ar[i]);
             }
         }
         return newArr;
     }