js从请求路径中根据参数名获取参数值

从地址栏上获取地址,且根据参数名获取值

    getQueryString:function(name) {
        var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)', 'i');
        var r = window.location.search.substr(1).match(reg);
        if (r != null) {
            return unescape(r[2]);
        }
        return null;
    }

或者 

 getParam:function(name){
      var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
      var r = window.location.search.substr(1).match(reg);
      if(r != null) return decodeURIComponent(r[2]);
      return null;
 }

或者

getQueryStringByName:function(name){
   var result = window.location.search.match(new RegExp("[\?\&]" + name+ "=([^\&]+)","i"));
   if(result == null || result.length < 1){
      return "";
   }
   return result[1];
}

使用方法:

    var value = this.getQueryString('fightId')

根据名称获取地址字符串中的参数值

getParam:function(url,name){
    var reg = new RegExp("(^|\\?|&)"+ name +"=([^&]*)(\\s|&|$)", "i");
    if (reg.test(url)) return unescape(RegExp.$2.replace(/\+/g, " "));
    return "";
},

使用

var value = this.getParam("http://www.maoyupeng.com?weibo=hongtu1993@sina.cn","weibo");

// 输出: hongtu1993@sina.cn