I'm trying to figure out a way to read GET method information from a form with javascript. Our IT department has our servers on lockdown, and as the web team we can only use javascript to accomplish our tasks. I'd use PHP if I could, but I can't.

What I need to do is read data sent via GET method in js if possible, so that I can assign the data into variables, and use it on individual pages after a user takes action on a form.

ie. if data is sent in the url http://somesite.com?add_to_cart=true&items=10

Any help would be appreciated!

function getQuerystring(key, default_)
{
  if (default_==null) default_="";
  key = key.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regex = new RegExp("[\\?&]"+key+"=([^&#]*)");
  var qs = regex.exec(window.location.href);
  if(qs == null)
    return default_;
  else
    return qs[1];
}

var addtocart = getQuerystring('add_to_cart','false');

source: http://www.bloggingdeveloper.com/post/JavaScript-QueryString-ParseGet-QueryString-with-Client-Side-JavaScript.aspx

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