js获取实时时间

1         var date = new Date();
2         var year = date.getFullYear();
3         var month = date.getMonth()+1;
4         var day = date.getDate();
5         var hour = date.getHours();
6         var minute = date.getMinutes();
7         var second = date.getSeconds();
8         alert(year+‘年‘+month+‘月‘+day+‘日 ‘+hour+‘:‘+minute+‘:‘+second);