Update index.html

Author: LanWei22

index.html

@@ -7893,9 +7893,11 @@ <h3>Dispatching actions</h3>
     property set to "<code>pause</code>"
     or <var>action object</var> has <code>type</code> property set
     to "<code>pointer</code>" and <code>subtype</code> property set
-    to "<code>pointerMove</code>", let <var>duration</var> be equal to
-    the <code>duration</code> property of
-    <var>action object</var>.
+    to "<code>pointerMove</code>", or <var>action object</var> has
+    <code>type</code> property set to "<code>wheel</code>" and
+    <code>subtype</code> property set to "<code>scroll</code>",
+    let <var>duration</var> be equal to the <code>duration</code>
+    property of <var>action object</var>.
 
    <li><p>If <var>duration</var> is not <a>undefined</a>,
     and <var>duration</var> is greater than <var>max duration</var>,
@@ -7949,6 +7951,8 @@ <h3>Dispatching actions</h3>
 <tr><td>"<code>pointer</code>"	<td>"<code>pointerUp</code>"		<td><a>Dispatch a pointerUp action</a>
 <tr><td>"<code>pointer</code>"	<td>"<code>pointerMove</code>		<td><a>Dispatch a pointerMove action</a>
 <tr><td>"<code>pointer</code>"	<td>"<code>pointerCancel</code>		<td><a>Dispatch a pointerCancel action</a>
+<tr><td>"<code>wheel</code>"	<td>"<code>pause</code>"		<td><a>Dispatch a pause action</a>
+<tr><td>"<code>wheel</code>"	<td>"<code>scroll</code>"		<td><a>Dispatch a scroll action</a>	
 </table>
 
    <li><a>Try</a> to run <var>algorithm</var> with arguments