Question

I got a URL like this:

http://google.de/test.php?a=b&c=d&e=f

I know got to modify just one of the GET params like this: (c is “h” instead of “d”)

http://google.de/test.php?a=b&c=h&e=f

and redirect to the new url. All other GET params should stay the same.

How am I going to do this?

Answer 1

I agree its best to use a library for this purpose as mentioned in other answers.

However, here is a string replacement solution based on regular expressions if you need a simpler quick fix.

var url = "http://my.com/page?x=y&z=1&w=34";

var regEx = /([?&]z)=([^#&]*)/g;
var newurl = url.replace(regEx, '$1=newValue');

Here I’m replacing the query string key ‘z’ with ‘newVlaue’

Have a look at this fiddle: http://jsfiddle.net/BuddhiP/PkNsx