This is a plugin that adds two functions to the jQuery global object for parsing query parameters. It will automatically decode URI encoded values and restore any spaces that may have been replaced with the plus sign.

You can see the plugin in action at:

http://jsfiddle.net/mattsnider/spHAD/

This function accepts a query string and returns a JavaScript object on which the query string key/value pairs are applied. So passing the following query string:

$.parseQuery('?&key1=value1&key2=value2');

Will return the object:

{
	key1: 'value1',
	key2: 'value2'
}

This is a shortcut method that passing window.location.search to $.parseQuery and cached the result. So calling $.getQuery on the url http://www.myserver.com/?&foo=bar&foofoo=baz will return:

Will return the object:

{
	foo: 'bar',
	foofoo: 'baz'
}

The regex is robust enough handle lots of improperly formatted strings.

The regex can find properly formatted query parameters anyplace in a string, even if proceeded and succeed with crap:

$.parseQuery('?jjsdlgalgdja&foo=bar&adfasdfasdfasdfa');

Will return the object:

{
	foo: 'bar'
}

The function checks if the first letter in the query string is ?, removing it only as necessary, so the following three strings behave identically:

$.parseQuery('?&foo=bar');
$.parseQuery('&foo=bar');
$.parseQuery('foo=bar');

Returning the object:

{
	foo: 'bar'
}

If you have a key without a value, it is not written to the object:

$.parseQuery('?&foo=bar&baz');

Will return the object:

{
	foo: 'bar'
}

You can change this behavior by providing the tolerant option, so empty keys will be set to empty string ('':

$.parseQuery('?&foo=bar&baz', {tolerant: 1});

Will return the object:

{
	baz: '',
	foo: 'bar'
}

http://opensource.org/licenses/MIT