javascript里如何获取当前时间

<SCRIPT LANGUAGE="JavaScript">
   <!--
var now= new Date();
var year=now.getYear();
var month=now.getMonth()+1;
var day=now.getDate();
var hour=now.getHours();
var minute=now.getMinutes();
var second=now.getSeconds();
    alert(year+"-"+month+"-"+day+" "+hour+":"+":"+minute+":"+second);
   -->
   </SCRIPT>