JQuery: How To Get URL Parameters & Values

While developing on a Drupal website, I was using the URLFill module to automatically fill in the form fields with some GET variables in the URL (something like http://example.com?var1=value1&var2=value2). For some reason it is not filling-up a Content Taxonomy field where the widget is set as autocomplete. So what I did was to implement the auto-filling of the said field with JQuery. This was the function I used: