XMLHttpRequest memory leak on server side (php, apache, javascript)?

Question

Is it even possible that ajax/javascript/xmlhttprequest could cause apache to start eating up memory (other than bomb the host with a ton of requests all in a row)?

I am retrieving data using javascript -- XMLHttpRequest and PHP -- very simply. The data I am retrieving contains a standard pager (Prev, 1, 2, 3, etc., Next) that also contains a lot of onClick events. I know there is concern with creating new events without destroying the old and memory leaks (especially with older IE), but that is all client side, anyways, right?

I'm having an issue running out of memory on the server side and am not sure if I should even look into the javascript or not. I'm 99.99% sure my javascript can't be to blame, because if there was a memory leak, it would be on the client side anyways. But, some XMLHttpRequest techniques are still somewhat new to me.

Thanks in advance!