Question

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Get query string values in JavaScript

I am writing a jQuery function that saves an item remotely with Ajax. I’d like to be able to grab the edit.php?id=###&field=### info from the url right in my function. How would I do that?

Answer 1

You don’t need jQuery for this task, you can do it simply with javascript :

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

Then if you retrieve this url : http://www.yoursite.com/Index.php?g=12&param=43
to retrieve the ‘param’ parameter, all you need to do is this :

var param_value = gup('param');

or the ‘g’ parameter like this :

var param_value = gup('g');

or switch ‘param’ with the name of the parameter you need.