课程 \
JavaScript进阶篇
8-12 Navigator对象
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<script type="text/javascript">
var i=navigator.appName;
var j=navigator.appVersion;
var k=navigator.platform;
document.write(i+"<br />"+j+"<br />"+k);
</script>
<body>
</body>
</html>
2018-02-10
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8-7 History 对象
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>History对象</title>
</head>
<script type="text/javascript">
var HL = window.history.length
document.write(HL);
</script>
<body>
</body>
</html>
2018-02-10
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8-6 取消计时器clearTimeout()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
var num=0;
var i;
function startCount(){
document.getElementById('count').value=num;
num=num+1;
i=setTimeout("startCount()",1000);
}
function stopCount(){
clearTimeout(i);
}
</script>
</head>
<body>
<form>
<input type="text" id="count" />
<input type="button" value="Start" onclick="startCount()" />
<input type="button" value="Stop" onclick="stopCount()" />
</form>
</body>
</html>
2018-02-08
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8-5 计时器setTimeout()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
var num=0;
function startCount() {
document.getElementById('count').value=num;
num=num+1;
setTimeout("startCount()",1000);
}
setTimeout("startCount()",1000);
</script>
</head>
<body>
<form>
<input type="text" id="count" />
</form>
</body>
</html>
2018-02-08
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8-4 取消计时器clearInterval()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
function clock(){
var time=new Date();
document.getElementById("clock").value = time;
}
var i=setInterval("clock()",1000);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
<input type="button" value="Stop" onClick="clearInterval(i)" />
</form>
</body>
</html>
2018-02-08
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8-1 window对象
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>window对象</title>
<script type="text/javascript">
function openwin(){
alert("欢迎来到慕课网。");
if(confirm("是否打开慕课网？")){
window.open("http://www.imooc.com","_blank",width="600",height="600");
}
}
</script>
</head>
<body>
<form>
<input type="button" value="点击我，打开新窗口" onClick="openwin()" />
</form>
</body>
</html>
2018-02-08
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7-23 编程练习
<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全带,准备启航</title>
<script type="text/javascript">
//通过javascript的日期对象来得到当前的日期，并输出。
var day=new Date();
var week=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write(day.getFullYear()+"年"+day.getMonth()+"月"+day.getDate()+"日 "+week[day.getDay()]+"<br />");
//成绩是一长窜的字符串不好处理，找规律后分割放到数组里更好操作哦
var scoreStr = "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
var scoreArr = sorceStr.split(";");
//从数组中将成绩撮出来，然后求和取整，并输出。
var sum = 0;
var avg = 0;
for (var i = 0; i < scoreArr.length; i++) {
sum = sum + parseInt(scoreArr[i].slice(3,5));
}
avg = sum / scoreArr.length;
document.write("班级平均分为："+parseInt(avg));
</script>
</head>
<body>
</body>
</html>
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7-22 数组排序sort()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array对象 </title>
<script type="text/javascript">
function sortNum(a,b) {
return b - a;
}
var myarr = new Array("80","16","50","6","100","1");
document.write(myarr.sort(sortNum));
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-21 选定元素slice()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array对象 </title>
<script type="text/javascript">
var myarr1= ["我","爱","你"];
document.write(myarr1.slice(1,3));
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-20 颠倒数组元素顺序reverse()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array对象 </title>
<script type="text/javascript">
var myarr1= ["我","爱","你"];
document.write(myarr1.reverse());
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-19 指定分隔符连接数组元素join()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array对象 </title>
<script type="text/javascript">
var myarr1= new Array("86","010")
var myarr2= new Array("84697581");
var myarr3= myarr1.concat(myarr2);
document.write(myarr3.join("_"));
</script>
</head>
<body>
</body>
</html>
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7-18 数组连接concat()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Array对象 </title>
<script type="text/javascript">
var myarr1= new Array("010")
var myarr2= new Array("-","84697581");
document.write(myarr1.concat(myarr2));
</script>
</head>
<body>
</body>
</html>
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7-16 随机数 random()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
document.write(Math.round(Math.random()*10));
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-13 向上取整ceil()
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Math </title>
<script type="text/javascript">
document.write(Math.ceil(3.3)+"<br />");
document.write(Math.ceil(-0.1)+"<br />");
document.write(Math.ceil(-9.9)+"<br />");
document.write(Math.ceil(8.9));
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-11 提取指定数目的字符substr()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script type="text/javascript">
var mystr="Hello World!";
document.write( mystr.substr(6) + "<br />");
document.write( mystr.substr(0,6) );
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-10 提取字符串substring()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>string对象</title>
<script type="text/javascript">
var mystr="Hello World!"
document.write( mystr.substring("6") + "<br />");
document.write( mystr.substring(0,5) );
</script>
</head>
<body>
</body>
</html>
2018-02-08
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7-9 字符串分割split()
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script type="text/javascript">
var mystr="86-010-85468578";
document.write( mystr.split("-") + "<br />");
document.write( mystr.split("") + "<br />");
document.write( mystr.split("",3) );
</script>
</head>
<body>
</body>
</html>
2018-02-08
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