js获取url参数值

 1 $urlp = function(key){
 2     var qstring = window.location.search;
 3     if (!qstring) return (!key || key == ‘*‘) ? {} : null;
 4     qstring = qstring.replace(/%20/g, ‘ ‘);
 5     qstring = qstring.substr(1); // remove ?
 6     var param = qstring.split(‘&‘);
 7     var map = new Object();
 8     for (var i = 0, j = param.length; i < j; i++){ var pl=param[i].split(‘=‘); map[pl[0]] = pl[1]; }
 9     return (!key || key == ‘*‘) ? map : map[key];
10 };