<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body>
<script type="text/javascript">
function people(name,age){
this.name = name;
this.age = age;
}
son = new people("leo",30);
document.write("name : "+son.name+" , age : "+son.age);
</script>
</body>
</html>1) String：字符串可以使用单引号或双引号
1 在字符串中查找字符串：indexOf() 存在返回位置（0开始），不存在返回-1
2 内容匹配：match()
3 替换内容：replace("原","改")
4 字符串大小写转换 toUpperCase()/toLowerCase()
5 将字符串转换为数组 split()
例：
var str1 = "hello oo";
var s = str1.split(" ");
document.write(s[1]);2) 日期
var Date = new Date();
document.write(date);
getFullYear() 获得当前年份
getTime() 获取毫秒
setFullYear() 设置时间
getHours() getMinutes() getSeconds()
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
</head>
<body onload="startTime()">
<script type="text/javascript">
function startTime(){
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
document.getElementById("time").innerHTML = h+" : "+m+" : "+s;
t = setTimeout(function(){
startTime();
},1000);
}
function checkTime(i){
if(i<10){
i="0"+i;
}
return i;
}
</script>
<p id="time"></p>
</body>
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