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<title>PARAM - Object Parameter</title>
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<h1>PARAM - Object Parameter</h1>
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<table>
<tr valign=top>
<th>Syntax</th>
<td><strong class=required><PARAM></strong></td>
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<th>Attribute Specifications</th>
<td>
<ul>
<li><strong class=required>NAME=<var><a href="../values.html#cdata">CDATA</a></var> (property name)</strong></li>
<li>VALUE=<var><a href="../values.html#cdata">CDATA</a></var> (property value)</li>
<li>VALUETYPE=[ <em class=default>data</em> | ref | object] (type of value)</li>
<li>TYPE=<var><a href="../values.html#contenttype">ContentType</a></var> (content-type of value resource)</li>
<li><a href="../attrs.html#id">ID</a>=<var><a href="../values.html#id">ID</a></var></li>
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<th>Contents</th>
<td>Empty</td>
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<th>Contained in</th>
<td><span class=transitional><a href="applet.html">APPLET</a>, </span><a href="object.html">OBJECT</a></td>
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<p>The <strong class=html>PARAM</strong> element provides parameters for the <strong class=html><a href="object.html">OBJECT</a></strong> <span class=transitional> and <strong class=html><a href="applet.html">APPLET</a></strong> </span>element<span class=transitional>s</span>. An <strong class=html>OBJECT</strong> <span class=transitional> or <strong class=html>APPLET</strong> </span>may contain any number of <strong class=html>PARAM</strong> elements prior to the alternate content that is also contained within the <strong class=html>OBJECT</strong> <span class=transitional> or <strong class=html>APPLET</strong> </span>element.</p>
<p>The required <strong class=html>NAME</strong> attribute of <strong class=html>PARAM</strong> gives the name of the parameter while the <strong class=html>VALUE</strong> attribute gives the parameter's value. The parameters recognized are specific to the kind of object being embedded or to the plug-in that renders the embedded object. For example, a clock applet may accept parameters to specify the style of the clock and the colors to use:</p>
<p class=example><code class=html><OBJECT CLASSID="java:Clock.class" CODETYPE="application/java" WIDTH=100 HEIGHT=100 TITLE="A real live clock!" STANDBY="Do you know what time it is?"><br><PARAM NAME=TYPE VALUE=ANALOG><br>
<PARAM NAME=BGCOLOR VALUE=WHITE><br><PARAM NAME=FGCOLOR VALUE=NAVY><br></OBJECT></code></p>
<div class=transitional>
<p class=note>Note that the <strong class=html>PARAM</strong> elements used in the preceding example would not change if the <strong class=html>APPLET</strong> element were used in place of <strong class=html>OBJECT</strong>.</p>
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<p>Objects such as videos, audio clips, and <abbr class=initialism title="Virtual Reality Modeling Language">VRML</abbr> worlds are typically handled by browser plug-ins. Each plug-in recognizes certain parameters, which can make choosing parameters difficult when the author does not know which plug-in the user has. However, unsupported parameters should be safely ignored. The following example uses parameters specific to the <a href="http://www.apple.com/quicktime/">QuickTime</a> movie plug-in as well as parameters specific to the <a href="http://www.netscape.com/comprod/products/navigator/version_3.0/multimedia/audio/index.html">LiveAudio</a> audio plug-in:</p>
<p class=example><code class=html><OBJECT DATA="mlk.mov" TYPE="video/quicktime" TITLE="Martin Luther King's &quot;I Have a Dream&quot; speech" WIDTH=150 HEIGHT=150><br><PARAM NAME=pluginspage VALUE="http://quicktime.apple.com/"><br><PARAM NAME=autoplay VALUE=true><br><OBJECT DATA="mlk.wav" TYPE="audio/x-wav" TITLE="Martin Luther King's &quot;I Have a Dream&quot; speech"><br><PARAM NAME=autostart VALUE=true><br><PARAM NAME=hidden VALUE=true><br><A HREF="mlk.html">Full text of Martin Luther King's "I Have a Dream" speech</A><br></OBJECT><br></OBJECT></code></p>
<p>Note that only the parameters specified within the <strong class=html>OBJECT</strong> and prior to the alternate content are passed onto the plug-in, so that the <strong class=html>pluginspage</strong> and <strong class=html>autoplay</strong> parameters are used if the QuickTime movie is played while the <strong class=html>autostart</strong> and <strong class=html>hidden</strong> parameters are used if the audio clip is played.</p>
<p>The <strong class=html>VALUETYPE</strong> parameter of <strong class=html>PARAM</strong> designates the type of the <strong class=html>VALUE</strong> attribute. The default value for <strong class=html>VALUETYPE</strong> is <strong class=html>data</strong>, which indicates that the <strong class=html>VALUE</strong> attribute contains a string.</p>
<p>The <strong class=html>ref</strong> value for <strong class=html>VALUETYPE</strong> indicates that the <strong class=html>VALUE</strong> attribute contains a <abbr class=initialism title="Uniform Resource Identifier">URI</abbr> where run-time values are stored. The Internet media type of the resource is specified by the <strong class=html>TYPE</strong> attribute. The following example uses values with <strong class=html>VALUETYPE=ref</strong> to specify the location of images to animate and a sound to play during the animation:</p>
<p class=example><code class=html><OBJECT CLASSID="java:Animator.class" CODETYPE="application/java" WIDTH=200 HEIGHT=300 TITLE="Wedding Photos"><br><PARAM NAME=IMAGE1 VALUE="images/wedding/bride.jpg" VALUETYPE=ref TYPE="image/jpeg"><br><PARAM NAME=IMAGE2 VALUE="images/wedding/groom.jpg" VALUETYPE=ref TYPE="image/jpeg"><br><PARAM NAME=IMAGE3 VALUE="images/wedding/cake.jpg" VALUETYPE=ref TYPE="image/jpeg"><br><PARAM NAME=SOUND VALUE="http://www.htmlhelp.com/sounds/weddingmarch.au" VALUETYPE=ref TYPE="audio/basic"><br></OBJECT></code></p>
<p class=note>The <abbr class=initialism title="Uniform Resource Identifier">URI</abbr> specified by <strong class=html>VALUE</strong> is passed to the object without being resolved to a full <abbr class=initialism title="Uniform Resource Locator">URL</abbr>. In the preceding example, the Java class would be responsible for resolving and fetching the contents of partial <abbr class=initialism title="Uniform Resource Identifier">URI</abbr>s like "images/wedding/cake.jpg".</p>
<p><strong class=html>VALUETYPE</strong> also takes an <strong class=html>object</strong> value, for use when a <strong class=html>VALUE</strong> attribute specifies an identifier of a separate <strong class=html><a href="object.html">OBJECT</a></strong> in the document. The following example features a hypothetical application for interactively walking through the frames of an animated <acronym title="Graphics Interchange Format">GIF</acronym>. The <acronym title="Graphics Interchange Format">GIF</acronym> is loaded in a separate <strong class=html>OBJECT</strong> from the application that uses it.</p>
<p class=example><code class=html><OBJECT DECLARE ID=mygif DATA="animation.gif" TYPE="image/gif"><br></OBJECT><br><OBJECT CLASSID="framepicker"><br><PARAM NAME=image VALUE="#mygif" VALUETYPE=object><br><IMG SRC="animation.gif" ALT="[Example of an animated GIF]"><br></OBJECT></code></p>
<h2>More Information</h2>
<ul>
<li><a href="http://www.w3.org/TR/REC-html40/struct/objects.html#edef-PARAM">PARAM in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML4.0 Recommendation</a></li>
<li><a href="http://www.w3.org/TR/REC-html32#param">PARAM in <abbr class=initialism title="World Wide Web Consortium">W3C</abbr> HTML3.2 Recommendation</a></li>
<li><a href="../../wilbur/special/param.html">PARAM in <abbr class=initialism title="Web Design Group">WDG</abbr> HTML3.2 Reference</a></li>
<li><a href="http://www.malibutelecom.com/yucca/HTML3.2/5.43.html">PARAM in <cite>Learning HTML3.2 by Examples</cite></a></li>
</ul>
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