写一个将当前页面 URL 中的 get 参数解析成一个对象的方法。

 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;
 }