How to pass search string to javascript from javascript?

Question

I've been using the following dynamic scripting technique for executing a site-specific subroutine in an otherwise generic script, viz

siteExtras : function (cid, extras) {
  var script = document.createElement("script");
  script.src = 'https://' + cid + '.mysite.com/' + cid + "_extras.js?" + extras;
  script.type = 'text/javascript';
  var h = document.getElementsByTagName("script")[0];
  h.parentNode.insertBefore(script, h);
},

So given the following invocation

this.siteExtras('cycles','concept=tandem');

script.src thus becomes

https://cycles.mysite.com/cycles_extras.js?concept=tandem

where cycles is a client-specific subdomain I've created on mysite.com.

The issue I'm having is that I've been assuming that cycles_extras.js would be capable of reading it's own search string, using

//cycles_extras.js
function getParameterByName(name) {
    var args = location.search.substr(1).split('&');
    for (var i = 0; i < args.length; i++) {
        var parts = args[i].split('=');
        if (name === parts[0]) {
            return unescape(parts[1]);
        }
    }
    return "";
}
var concept = getParameterByName('concept');
...

however, when cycles_extras.js is executed, it takes its location.search from the browser, not from the https://cycles.mysite.com/cycles_extras.js?concept=tandem URL.

Am I attempting the impossible here? Or is something missing?

you can use global namespace for help. Bind the values to a variable and attach it to window or document objects. Example, document.concept = "tandem" or window.concept = "tandem" — Selvam Palanimalai
– Selvam Palanimalai, Commented Sep 10, 2013 at 8:03
@SelvamPalanimalai - please make your comment an answer. Then I can give it a big green tick! — bugmagnet
– bugmagnet, Commented Sep 10, 2013 at 9:05

Selvam Palanimalai · Accepted Answer · 2013-09-10 10:36:43Z

1

You can use global namespace for help. Bind the values to a variable and attach it to window or document objects. Example,

document.concept = "tandem" 

window.concept = "tandem".

answered Sep 10, 2013 at 10:36

Selvam Palanimalai

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