想数组特定位置插入值，删除数组中特定值-splice

1.向特定位置插入元素

//array.splice(index,howmany,item1,.....,itemX)
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2,0,"Lemon","Kiwi");

2.从数组中删除特定元素

//
var fruits = ["Banana", "Orange", "Apple", "Mango"];
var index=$.inArray("Apple",fruits);
boxList.splice(index,1); //删除数组中的项