JS Add/Remove array element definitions and usage

<script>
var a = new Array (1, 2, 3)
var B = A.push (4,5,[6,7])//a for [1, 2, 3, 4, 5, [6, 7]] B for 6 note the push () method will not open an array for you
var c = new Array (1, 2, 3, 4, "a")
var d = c.pop ()//c is [1, 2, 3, 4] D as a string of "a"
</script>
For more details please see: http://www.111cn.net/wy/js-ajax/34754_1.htm

JS Add/Remove array element definitions and usage
The splice () method inserts, deletes, or replaces the elements of an array.

Grammar
Arrayobject.splice (index,howmany,element1,....., elementx)
Parameter description
Index required. Specify where to add/remove elements from.

This parameter is the subscript for the array element that starts inserting and/or deleting, and must be a number.

Howmany required. Specify how many elements should be deleted. Must be a number, but it can be "0".

If this parameter is not specified, all elements that start from index to the end of the original array are deleted.

Element1 Optional. Specify the new element to add to the array. Start the insertion at the lower mark that is indicated by index.
Elementx Optional. You can add several elements to an array.

<script>
A=new Array (' A ', ' B ', ' C ');
A.splice (1,1);
for (i=0;i<a.length;i++)
{
Alert (A[i]);
}
</script>

See more detailed examples

<div id= "Example" >

<div id= "Example_main" >

<!--************************************* instance code started *************************************-->

<script language= "JavaScript" >
<!--
Array.prototype.insertat = function (index, value) {
var part1 = this.slice (0, index);
var part2 = this.slice (index);
Part1.push (value);
Return (Part1.concat (part2));
};

Array.prototype.removeat = function (index)
{
var part1 = this.slice (0, index);
var part2 = this.slice (index);
Part1.pop ();
Return (Part1.concat (part2));
}
-->
</script>

<p>
<strong> Original Array </strong>
<br/>
var numbers = new Array (8888, 3561, 0, 4133, 5555, 1); <br/>

<script language= "JavaScript" >
<!--
var numbers = new Array (8888, 3561, 0, 4133, 5555, 62, 1);
-->
</script>

<br/><br/>

<strong> perform the following operations </strong><br/>
Numbers = Numbers.removeat (5); <br/>
Numbers = Numbers.insertat (2, 666); <br/><br/><br

 <strong> results </strong><br/>
 <script language= "javascript"
 < !--
  numbers = numbers.removeat (5);
  numbers = Numbers.insertat (2, 666);
  document.write (Numbers.join (","));
 //
 </script>
</p>