playList Collection

Retrieves a collection of playitem objects.

dhtml语法

[ ocoll = ] object.playlist
[ oobject = ] object.playlist(iindex)

dhtml可能的值

ocoll array of elements contained by the object.
oobject reference to an individual item in the array of elements contained by the object.
iindex required. integer that specifies the zero-based index of the item to be returned.

members table

The following table lists the members exposed by the playList object. Click a tab on the left to choose the type of member you want to view.
Attributes/Properties
Attribute Property Description
activeTrack Sets or retrieves the track, or playItem object, that is currently active in the playList collection.
banner   Retrieves the Banner content of an entry in an Advanced Stream Redirector (ASX) file.
bannerabstract   Retrieves the BannerAbstract content of an entry in an ASX file.
bannermoreinfo   Retrieves the bannermoreinfo content of an entry in an asx file.
dur dur Sets or retrieves a value indicating the amount of time the element remains active or displayed.
length Retrieves the number of objects in a collection.
Methods
Method Description
item Retrieves an object from the specified collection.
nextTrack Advances the media-playing container to the next track, or playItem object, in the playList collection, and begins playing that track.
prevTrack Sets the media-playing container to the previous track, or playItem object, in the playList collection and begins playing that track.
Objects
Object Description
playItem Represents an individual media file in a playList collection.

Attribute	Property	Description
	activeTrack	Sets or retrieves the track, or playItem object, that is currently active in the playList collection.
	banner	Retrieves the Banner content of an entry in an Advanced Stream Redirector (ASX) file.
	bannerabstract	Retrieves the BannerAbstract content of an entry in an ASX file.
	bannermoreinfo	Retrieves the bannermoreinfo content of an entry in an asx file.
dur	dur	Sets or retrieves a value indicating the amount of time the element remains active or displayed.
	length	Retrieves the number of objects in a collection.

Method	Description
item	Retrieves an object from the specified collection.
nextTrack	Advances the media-playing container to the next track, or playItem object, in the playList collection, and begins playing that track.
prevTrack	Sets the media-playing container to the previous track, or playItem object, in the playList collection and begins playing that track.

Object	Description
playItem	Represents an individual media file in a playList collection.

Remarks

Some media file formats contain several individual media files, such as an MPEG-Layer 3 (MP3) playlist that contains several MP3 files. This collection provides access to those individual media files.
The playList collection is available only while the parent element is active on the timeline. When the parent element's timeline ends, this collection is no longer available.

DHTML代码范例

This example demonstrates how to retrieve a collection of playItem objects using the playList collection.

<HTML XMLNS:t="urn:schemas-microsoft-com:time">
<HEAD>
<?IMPORT namespace="t" implementation="#default#time2">
<STYLE>
.time{ behavior: url(#default#time2);}
</STYLE>
<SCRIPT LANGUAGE="JavaScript">
function updateBtns() {
if(m1.currTimeState.isActive){
b0.disabled=true;
b1.disabled=false;
b2.disabled=false;
b3.disabled=false;
}else{
b0.disabled=false;
b1.disabled=true;
b2.disabled=true;
b3.disabled=true;
}
}
function updateFields(){
title1.innerText = 'Title: ' + m1.playList.activeTrack.title;
author1.innerText = 'Author: ' + m1.playList.activeTrack.author;
abstract1.innerText = 'Abstract: ' + m1.playList.activeTrack.abstract;
copyright1.innerText = 'Copyright: ' + m1.playList.activeTrack.copyright;
}
function emptyFields(){
title1.innerText = 'Title: ';
author1.innerText = 'Author: ';
abstract1.innerText = 'Abstract: ';
copyright1.innerText = 'Copyright: ';
}
</SCRIPT>
</HEAD>
<BODY onload="updateBtns()" TOPMARGIN=0 LEFTMARGIN=0 BGPROPERTIES="FIXED"
BGCOLOR="#FFFFFF" LINK="#000000" 	VLINK="#808080" ALINK="#000000">
...
<t:media id="m1" src="../../common/samples/author/behaviors/media/media.asx"
onmediacomplete="updateFields();updateBtns();"/>
<SPAN id="title1">Title:</SPAN><BR>
<SPAN id="author1">Author:</SPAN><BR>
<SPAN id="abstract1">Abstract:</SPAN><BR>
<SPAN id="copyright1">Copyright</SPAN><BR><BR>
<BUTTON id="b0" onclick="m1.beginElement();updateFields();updateBtns();">Start</BUTTON>
<BUTTON id="b1" onclick="m1.playList.nextTrack();updateFields();">Next Track</BUTTON>
<BUTTON id="b2" onclick="m1.playList.prevTrack();updateFields();">Previous Track</BUTTON>
<BUTTON id="b3" onclick="m1.endElement();emptyFields();updateBtns();">Stop</BUTTON>
<BR><BR>
</BODY>
</HTML>

This feature requires Microsoft?Internet Explorer 5.5 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

是否符合公共标准

This collection is a Microsoft extension to Synchronized Multimedia Integration Language (SMIL) .

Applies To

t:AUDIO, t:MEDIA, t:REF, t:VIDEO

更多语法参考

Introduction to HTML+TIME

ocoll	array of elements contained by the object.
oobject	reference to an individual item in the array of elements contained by the object.
iindex	required. integer that specifies the zero-based index of the item to be returned.