I have for example the following URL stored in a global variable:

var myUrl = http://mydomain.com/something?row=1;

Then a function has to add let's say another parameter called column. How would that function add parameters to a pre-existing URL string using jQuery?

Example of the expected generated string:

http://mydomain.com/something?row=1&column=9

The problem is that myUrl could also be just:

var myUrl = http://mydomain.com/something;

(Notice that there are not pre-existing parameters)