<body style="background-color:#8EEE5EE;">
<section id="skin">
<video id="myMovie" width="640" height="360">
<source src="videos/Introduction.mp4">
</video>
<nav>
<p id="buttons">
<button type="button" id="playButton">Play</button>
</p>
<p id="defaultBar">
<p id="progressBar"></p>
</p>
<p style="clear:both"></p>
</nav>
</section>
</body>
body{
text-align:center;
}
header,section,footer,aside,nav,article,hgroup{
display:block;
}
#skin{
width:700px;
margin:10px auto;
padding:5px;
background:red;
border:4px solid black;
border-radius:20px;
}
nav{
margin:5px 0px;
}
#buttons{
float:left;
width:70px;
height:22px;
}
#defaultBar{
position:relative;
float:left;
width:600px;
height:14px;
padding:4px;
border:1px solid black;
background:yellow;
}
/*progressBar在defaultBar内部*/
#progressBar{
position:absolute;
width:0px; /*使用javascript控制变化*/
height:14px; /*和defaultBar高度相同*/
background:blue;
}
function doFisrt()
{
barSize=600; //注意不要使用px单位，且不要用var，是全局变量
myMovie=document.getElementById('myMovie');
playButton=document.getElementById('playButton');
bar=document.getElementById('defaultBar');
progressBar=document.getElementById('progressBar');
playButton.addEventListener('click',playOrPause,false); //第三个参数总是false, Register the event handler for the bubbling phase.
bar.addEventListener('click',clickedBar,false);
}
//控制movie播放和停止
function playOrPause(){
if(!myMovie.paused && !myMovie.ended){
myMovie.pause();
playButton.innerHTML='Play';
window.clearInterval(updatedBar);
}else{
myMovie.play();
playButton.innerHTML='pause';
updatedBar=setInterval(update,500);
}
}
//控制进度条的动态显示
function update(){
if(!myMovie.ended){
var size=parseInt(myMovie.currentTime*barSize/myMovie.duration);
progressBar.style.width=size+'px';
}else{
progressBar.style.width='0px';
playButton.innerHTML='Play';
window.clearInterval(updatedBar);
}
}
//鼠标点击进度条控制方法
function clickedBar(e){
if(!myMovie.paused && !myMovie.ended){
var mouseX=e.pageX-bar.offsetLeft;
var newtime=mouseX*myMovie.duration/barSize; //new starting time
myMovie.currentTime=newtime;
progressBar.style.width=mouseX+'px';
window.clearInterval(updatedBar);
}
}
window.addEventListener('load',doFisrt,false);