I want to read out an url parameter using jquery and bind this one in a variable. I've seen a lot of ways to solve it but definitely no one worked for me.

http://relaunch.headonline.de/projekte/#filter=kataloge-database

-> I'm using a '#' instead of a '&' or '?'!

This is my current javascript:

function $_GET(param) {

    var vars = {};

    window.location.href.replace( location.hash, '' ).replace( 

        /[?&]+([^=&]+)=?([^&]*)?/gi, // regexp

        function( m, key, value ) { // callback

            vars[key] = value !== undefined ? value : '';

        }

    );



    if ( param ) {

        return vars[param] ? vars[param] : null;    

    }

    return vars;

}



var filter = $_GET('filter');