var text = "Hello World";
document.write("<p>" + text.indexOf("Hello") + "</p>");
document.write("<p>" + text.indexOf("World") + "</p>");
document.write("<p>" + text.indexOf("world") + "</p>");
document.write(text.match("Hello"));
document.write(text.match("World"));
document.write(text.match("Supan"));
document.write(text.replace(/Hello/, "Supans")); //输出Supans World
document.write("<br>");
document.write(text);
document.write(Date()); //Sat Mar 01 2014 22:58:22 GMT+0800
var d=new Date(); //当前日期时间
document.write("从 1970/01/01 至今已有：" + d.getTime() + " 毫秒。");
d.setFullYear(1992,10,3); //设置日期
document.write(d);
<script type="text/javascript">
var d = new Date();
var weekday = new Array(7);
weekday[0]="星期日";
weekday[1]="星期一";
weekday[2]="星期二";
weekday[3]="星期三";
weekday[4]="星期四";
weekday[5]="星期五";
weekday[6]="星期六";
document.write("今天是：" + weekday[d.getDay()]);
</script>
数字始终代码：
<html>
<head>
<script type="text/javascript">
function startTime(){
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
//add a zero in front of numbers < 10
m = checkTime(m);
s = checkTime(s);
document.getElementById("txt").innerHTML = h + ":" + m + ":" + s;
//setTimeout 方法用于在指定的毫秒数后调用函数或计算表达式。
setTimeout('startTime()',500);
}
//分钟，秒不足10的前面加上一个字符0
function checkTime(i){
if(i < 10){
i = "0" + i;
}
return i;
}
</script>
</head>
<body onload="startTime()">
<div id="txt"></div>
</body>
</html>
数组：
[code="java"]<script type="text/javascript">
var mycars = new Array();
mycars[0] = "Saab";
mycars[1] = "Volvo";
mycars[2] = "bmw";
for(var i = 0; i < mycars.length; i++)
{
document.write(mycars[i] + "</br>");
}
//数组的for循环，x是mycars的下标
for( x in mycars){
document.write(mycars[x] + "</br>");
}
</script>/code]
