制作DW倒计时效果

<script language="javascript">
var timedate=new Date("05-1-2013");
var times="五一";
var now=new Date();
var date=timedate.getTime()-now.getTime();
var time=Math.floor(date/(1000*60*60*24));
if(time>=0);
document.write("现在离2014年"+times+"还有:<font color=red><b>"+time+"</b></font>天"); </script>
<script language="javascript">
function clock(){i=i-1
document.title="本窗口将在"+i+"秒后自动关闭!";
if(i>0)setTimeout("clock();",1000);
else self.close();}
var i=3
clock();
</script>
<script language="javascript">
now=new Date(),hour=now.getHours()
if(hour<6){document.write("凌晨好！")}
else if(hour<9){document.write("早上好！")}
else if(hour<12){document.write("上午好！")}
else if(hour<14){document.write("中午好！")}
else if(hour<17){document.write("下午好！")}
else if(hour<19){document.write("傍晚好！")}
else if(hour<22){document.write("晚上好！")}
</script>。