Getting all the URL params in Javascript

I've been updating a lot of href's lately and found these functions to be very handy. They basically take all the pars in a string and put them in a JS object. There is other functions out there that get you 1 url param, but I wanted them all. Reason being, is I need to see if that param exists and do some more checks on it for business logic, then take all the pars and turn then into a querystring and add them back to href again.

getURLParameters = function(url){

       var results = {};
    
       if(url == ""){
               var url = window.document.URL.toString();
       }
       if (url.indexOf("?") > 0){
               var splitURL = url.split("?");
               params = splitURL[1].split("&");

               for (var i=0;i                       var param =  params[i].split("=");
                       if (param[1] != "")
                               results[param[0]] = unescape(param[1]);
                       else
                               results[param[0]] = "";
               }

       }

       return results;
};
getURL = function(url){

       if(url == ""){
               var url = window.document.URL.toString();
       }

       if(url.indexOf("?") > 0){
               var splitURL = url.split("?");
               url = splitURL[0];
       }

       return url;
};

getURL() actually serves two purposes. If a url isn't passed in get the current url. And it also cleans off all of params so all you get the base url.