More fixup for 'list-style-image'

Author: tabatkins

css3-lists/Overview.src.html

@@ -658,7 +658,7 @@ <h2 id=list-style-image>List Content: The 'list-style-image' property</h2>
 		<td><dfn>list-style-image</dfn>
 	<tr>
 		<th>Value:
-		<td>&lt;url> | none
+		<td>&lt;image> | none
 	<tr>
 		<th>Initial
 		<td>none
@@ -676,12 +676,12 @@ <h2 id=list-style-image>List Content: The 'list-style-image' property</h2>
 		<td>specified value
 </table>
 
-<p>This property sets the image that will be used as the list item marker. When the image is
-available, it is used as the default contents of ''::marker'' instead of the
-value specified by 'list-style-type'.</p>
+<p>This property sets the image that will be used as the list item marker. When 
+the <b>&lt;image></b> resolves to a valid image, it is used as the default contents 
+of ''::marker'' instead of the value specified by 'list-style-type'.</p>
 
-<p>If the value ''none'' is provided, then the default contents are given by 
-'list-style-type' instead.</p>
+<p>If the value ''none'' is provided, or the <b>&lt;image></b> doesn't resolve 
+to a valid image, then the default contents are given by 'list-style-type' instead.</p>
 
 <div class="example">
 	<p>The following example sets the marker at the beginning of each list item to