javascript中数组如何去掉空值

function trimSpace(array){ 

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

     { 

         if(array[i] == " " || array[i] == null || typeof(array[i]) == "undefined") 

         { 

                  array.splice(i,1); 

                  i= i-1; 

         } 

     } 

     return array; 

}