HTML5实战与剖析之媒体元素(6、视频实例)

　　html5中的视频标签和及其模仿视频播放器的效果在一些手机端应用比较多。因为手机端基本上废除了flash的独断，让html5当家做主人，所以对视频支持的比较好。所以今天专门为大家奉上html5视频标签模拟视频播放器的小例子，让大家更好的理解html5和有效的应用在项目中。

　　HTML代码

　　CSS代码

#p2{ width:300px; height:30px; background:#666666; position:relative;}
#p3{ width:30px; height:30px; background:red; position:absolute; left:0; top:0;}
#p4{ width:300px; height:20px; background:#666666; position:relative; top:10px;}
#p5{ width:20px; height:20px; background:yellow; position:absolute; right:0; top:0;}

　　JavaScript代码

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window.onload = function(){
	var oV = document.getElementById('v1');
	var op = document.getElementById('p1');
	var aInput = op.getElementsByTagName('input');
	
	var op2 = document.getElementById('p2');
	var op3 = document.getElementById('p3');
	var op4 = document.getElementById('p4');
	var op5 = document.getElementById('p5');
	
	var timer = null;
	
	//播放暂停
	aInput[0].onclick = function(){
	
		if(oV.paused){
			this.value = '暂停';
			oV.play();
			toShow();
			timer = setInterval(toShow,1000);
		}
		else{
			this.value = '播放';
			oV.pause();
			clearInterval(timer);
		}
		
	};
	
	aInput[2].value = timeChange(oV.duration);
	
	function timeChange(iAll){
	
		iAll = Math.floor(iAll);
	
		var hours = toZero(parseInt(iAll/3600));
		var mintus = toZero(parseInt(iAll%3600/60));
		var sends = toZero(parseInt(iAll%60));
		
		return hours + ":" + mintus + ":" + sends;
	
	}
	
	function toZero(num){
		if(num<10){
			return '0' + num;
		}
		else{
			return '' + num;
		}
	}
	
	function toShow(){
		aInput[1].value = timeChange(oV.currentTime);
		
		var scale = oV.currentTime/oV.duration;
		
		op3.style.left = scale * (op2.offsetWidth - op3.offsetWidth) + 'px';
		
	}
	
	//静音
	aInput[3].onclick = function(){
		if(oV.muted){
			this.value = '静音';
			oV.muted = false;
			op5.style.left = oV.volume*(op4.offsetWidth - op5.offsetWidth) + 'px';
		}
		else{
			this.value = '消除静音';
			oV.muted = true;
			op5.style.left = 0;
		}
	};
	
	var disX = 0;
	
	//进度调整
	op3.onmousedown = function(ev){
		var ev = ev || window.event;
		disX = ev.clientX - op3.offsetLeft;
		
		document.onmousemove = function(ev){
			var ev = ev || window.event;
			
			var L = ev.clientX - disX;
			
			if(L<0){
				L = 0;
			}
			else if(L>op2.offsetWidth - op3.offsetWidth){
				L = op2.offsetWidth - op3.offsetWidth;
			}
			
			op3.style.left = L + 'px';
			
			var scale = L/(op2.offsetWidth - op3.offsetWidth);
			
			oV.currentTime = scale * oV.duration;
			
			toShow();
			
		};
		document.onmouseup = function(){

			aInput[0].value = '暂停';
			oV.play();
			toShow();
			timer = setInterval(toShow,1000);

			document.onmousemove = null;
			document.onmouseup = null;
		};
		return false;
	};
	
	var disX2 = 0;
	
	//声音
	op5.onmousedown = function(ev){
		var ev = ev || window.event;
		disX2 = ev.clientX - op5.offsetLeft;
		
		document.onmousemove = function(ev){
			var ev = ev || window.event;
			
			var L = ev.clientX - disX2;
			
			if(L<0){
				L = 0;
			}
			else if(L>op4.offsetWidth - op5.offsetWidth){
				L = op4.offsetWidth - op5.offsetWidth;
			}
			
			op5.style.left = L + 'px';
			
			var scale = L/(op4.offsetWidth - op5.offsetWidth);	
			
			oV.volume = scale;
			
		};
		document.onmouseup = function(){
			document.onmousemove = null;
			document.onmouseup = null;
		};
		return false;
	};
	
	//全屏
	aInput[4].onclick = function(){
	
		oV.webkitRequestFullScreen();
	
	};
	
};

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