js如何取当前日期时间/格式为:yyyy-mm-dd hh:mm:ss

<script type="text/javascript">
//取当前时间，格式为,yyyy-mm-dd hh:mm:ss
function GetDateT()
{
var d,s;
d = new Date();
s = d.getYear() + "-";             //取年份
s = s + (d.getMonth() + 1) + "-";//取月份
s += d.getDate() + " ";         //取日期
s += d.getHours() + ":";       //取小时
s += d.getMinutes() + ":";    //取分
s += d.getSeconds();         //取秒

return(s);

}
myDate=GetDateT()
alert (myDate)
</script>

<div id="jnkc">
</div>
<script>setInterval("jnkc.innerHTML=new Date().toLocaleString();",1000);
</script>
<script>
var today =new Date()
alert((today.toLocaleString().replace(/年|月/g,'-')).replace(/日/g,''))
</script>

<script>
var today =new Date()
alert((today.toLocaleString().replace(/年|月/g,'-')).replace(/日/g,''))
</script>