I wanted a piece of code in pure javascript ( no framework required ) that could extract the parameters in the query string part of an URL.

I wanted it to be able to extract the parameters in this format name[key]=value  like they are used in php applications.

I found a piece of code on some other blogs or forum posts but it didn't work as I expected so here is my take on this.

 
function get_url_params(){
        var _GET = {};
        var s = location.search.replace( /^\?|#.*$/g, '' );
        if( s ) {
                var qsParts = s.split('&');
                var i, nv;
                for (i = 0; i < qsParts.length; i++) {
                        var nv = qsParts[i].split('=');
                        var n=decodeURIComponent(nv[0]);
                        var v=decodeURIComponent(nv[1]);
                        var k=n.split(/[\[\]\.]/);
                        if(k.length){
                                if(_GET[k[0]])_GET[k[0]][k[1]]=v;
                                else {
                                        if(parseInt(k[1])==k[1])
                                                _GET[k[0]]=[];
                                        else    _GET[k[0]]={};
                                        _GET[k[0]][k[1]]=v;
                                }       
                        }else _GET[n] = v;
                }
        }
        return _GET;
}   
 

This function one limitation: It doesn't work with multidimensional arrays. It's probably not hard to modify it to work like that but I only needed it to work with single dimension arrays.