Using JQuery to change element ID

Question

I've been trying to change an element ID using jquery for an A/B test.

From what ive seen, it should go something like this:

$('#tag').attr('oldId','newId');

But so far, no dice - any ideas?

*I've looked through the responses and i think i had the wrong end of the stick! I was assuming the current / old id had to be placed where ive labelled 'oldId', rather than id, followed by the replacement - silly mistake, thanks for all the help :)

Answer 1

Try to use the proper signature of .attr('attributeName','value'),

$('#tag').attr("id","newId")

Answer 2

Edited The right syntax is: $("#myId").attr("id", "mySecondId")