jQuery - insert item into array at a specific index

I am looking for a JavaScript array insert method, in the style of:

arr.insert(index, item)

Preferably in jQuery, but any JavaScript implementation will do at this point because I can't believe the trouble I'm having finding such a basic function! Thanks for your help.

From stackoverflow

• What you want is the splice function on the native array object. Quoted from the referenced link:

  In this example we will create an array and add an element to it:

  <script type="text/javascript">
     var arr = new Array(5);
     arr[0] = "Jani";
     arr[1] = "Hege";
     arr[2] = "Stale";
     arr[3] = "Kai Jim";
     arr[4] = "Borge";
  
     document.write(arr + "<br />");
     arr.splice(2,0,"Lene");
     document.write(arr + "<br />");
  </script>
  

  The output of the code above will be:

  Jani,Hege,Stale,Kai Jim,Borge
  Jani,Hege,Lene,Stale,Kai Jim,Borge
  

  tags2k : Thanks, I thought I would feel stupid for asking but now that I know the answer I don't! Why on earth did they decide to call it splice when a more searchable term was in common use for the same function?!

  Christoph : @tags2k: because the function does more than inserting items and it's name was already established in perl?

  tags2k : Ahh, Perl. That explains the obfuscation then ;-)