How do I add let's say something like ajax=1 to all links on my page with jquery. I will also need to check if the url has existing parameters. for example http://example.com/index.php?pl=132 will have to become http://example.com/index.php?pl=132&ajax=1

Also, if the link does not have any parameters, for example http://example.com/index.php, it will become http://example.com/index.php?ajax=1 I want to load the jQuery script on document ready so all links are changed on page load.