function getQuery () {

     var args = {};

     var query = window.location.search.substring(1);

     var pairs = query.split("&");

     for(var i = 0; i < pairs.length; i++) {

         var pos = pairs[i].indexOf('=');

         if (pos == -1) continue;

         var argname = pairs[i].substring(0, pos);

         var value = pairs[i].substring(pos+1);

         value = decodeURIComponent(value);

         args[argname] = value;

     }

     return args;

 }

 or

 function getQuery () {

     var ret = {},

         seg = location.search.replace(/^\?/,'').split('&'),

         len = seg.length, i = 0, s;

     for (;i<len;i++) {

         if (!seg[i]) { continue; }

         s = seg[i].split('=');

         ret[s[0]] = decodeURIComponent(s[1]);

     }

     return ret;

 }