H5 知识点
2017-01-19 09:20
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H5新特性video和audio标签
<!DOCTYPE html>
<html>
<body>
<div style="text-align:center;">
<button onclick="playPause()">播放/暂停</button>
<button onclick="makeBig()">大</button>
<button onclick="makeNormal()">中</button>
<button onclick="makeSmall()">小</button>
<br />
<video id="video1" width="420" style="margin-top:15px;">
<source src="/example/html5/mov_bbb.mp4" type="video/mp4" />
<source src="/example/html5/mov_bbb.ogg" type="video/ogg" />
Your browser does not support HTML5 video.
</video>
</div>
<script type="text/javascript">
var myVideo=document.getElementById("video1");
function playPause()
{
if (myVideo.paused)
myVideo.play();
else
myVideo.pause();
}
function makeBig()
{
myVideo.width=560;
}
function makeSmall()
{
myVideo.width=320;
}
function makeNormal()
{
myVideo.width=420;
}
</script>
</body>
</html>在head中调用script
<html>
<head>
<script type="text/javascript">
function message()
{
alert("该提示框是通过 onload 事件调用的。")
}
</script>
</head>
<body onload="message()">
</body>
</html>在body中调用script
<html>
<head>
</head>
<body>
<script type="text/javascript">
document.write("该消息在页面加载时输出。")
</script>
</body>
</html>调用外部脚本
<html> <head> </head> <body> <script src="/js/example_externaljs.js"> </script> <p> 实际的脚本位于名为 "xxx.js" 的外部脚本中。 </p> </body>
自定义事件
<!DOCTYPE html>
<html>
<head>
<script>
function myFunction()
{
document.getElementById("demo").innerHTML="My First JavaScript Function";
}
function myFunction2()
{
document.getElementById("head1").innerHTML="自定义函数";
}
</script>
</head>
<body>
<h1 id="head1">My Web Page</h1>
<p id="demo">A Paragraph.</p>
<button type="button" onclick="myFunction()">点击这里</button>
<button type="button" onclick="myFunction2()">点我</button>
</body>
</html>
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