javascript学习笔记（三）显示当时时间的代码

html代码如下：

<div id="showTime"></div> 

javascript 代码如下：时间显示格式为：2011-04-04 星期二 12:09:34

function startTime() { 
try{ 
var today = new Date(); 
var year = today.getFullYear(); 
var month = checkNum(today.getMonth()+1); 
var date = checkNum(today.getDate()); 
var day = today.getDay(); 
var hour = checkNum(today.getHours()); 
var minute = checkNum(today.getMinutes()); 
var second = checkNum(today.getSeconds()); 
switch(day) { 
case 1: 
day = "一"; 
break; 
case 2: 
day = "二"; 
break; 
case 3: 
day = "三"; 
break; 
case 4: 
day = "四"; 
break; 
case 5: 
day = "五"; 
break; 
case 6: 
day = "六"; 
break; 
case 7: 
day = "日"; 
break; 
} 
var fullTime = year+"-"+month+"-"+date+" "+"星期"+day+" "+hour+":"+minute+":"+second; 
document.getElementById("showTime").innerHTML = fullTime; 
setInterval('startTime()', 1000); 
}catch(e) { 
alert(e.description); 
} 
} 
function checkNum(num) { 
if(num<10) { 
num = "0"+num; 
} 
return num; 
}