JS获取URL参数

//获取URL参数

var getParam = function(name){

        var search = document.location.search;

        var pattern = new RegExp("[?&]"+name+"\=([^&]+)", "g");

        var matcher = pattern.exec(search);

        var items = null;

        if(null != matcher){

                try{

                        items = decodeURIComponent(decodeURIComponent(matcher[1]));

                }catch(e){

                        try{

                                items = decodeURIComponent(matcher[1]);

                        }catch(e){

                                items = matcher[1];

                        }

                }

        }

        return items;

};