Change URL parameters

Question

I have this URL:

site.fwx?position=1&archiveid=5000&columns=5&rows=20&sorting=ModifiedTimeAsc

what I need is to be able to

Answer 1

Would a viable alternative to String manipulation be to set up an html form and just modify the value of the rows element?

So, with html that is something like

With the following JavaScript to submit the form

var myForm = document.getElementById('myForm');
myForm.rows.value = yourNewValue;
myForm.submit();

Probably not suitable for all situations, but might be nicer than parsing the URL string.