var data=[10,25,50,10,20,80,30,30,40,90];		function fun(arr,index){		var min=Math.min.apply(this,arr);		if(index<=0){			return min;		}else{			arr=arr.filter((item)=>{return item!=min;});			if(arr.length==0){				return min;			}			return fun(arr,--index)		}	}	console.log(fun(data,2));

　　

var data=[10,25,50,10,20,80,30,30,40,90];	function fun(arr,index){		arr.sort((a,b)=>{return a-b;});		var min_index=0,min=arr[0];		if(index==0){			return min;		}		for(var i=0;i
     
      =index){					break;				}			}		}		return min;	}	console.log(fun(data,2));