Search and replace specific query string parameter value in javascript

Question

I have a string which is something like this :

a_href= \"www.google.com/test_ref=abc\";

I need to search for test_ref=abc in thisabove stri

Answer 1

Based on this discussion I have fixed the Chris function (problem with regex string!)

function updateUrlParameter(url, param, value){
    var regex = new RegExp('('+param+'=)[^\&]+');
    return url.replace( regex , '$1' + value);
}