Added: swac_showOnEmpty conditional showing

sites/concepts/4_design.html

@@ -298,7 +298,8 @@ <h2>Control view of layout parts</h2>
                 <tr><td>.swac_dontdisplay</td><td>Hides the element per default. This can be used for toggle visability.</td></tr>
                 <tr><td>[swac_display="{attribute}"]</td><td>Used for conditional display of elements. If the attribute is true the element will be shown.</td></tr>
                 <tr><td>[swac_hide="{attribute}"]</td><td>Used for conditional hiding of elements. If the attribute is true, the element will be hidden.</td></tr>
-                <tr><td>[swac_hideOnEmpty="{attribute}"}]</td><td>Used for conditional hiding of elements. If the attribute is empty, element will be hidden.</td></tr>
+                <tr><td>[swac_hideOnEmpty="{attribute}"]</td><td>Used for conditional hiding of elements. If the attribute is empty, element will be hidden.</td></tr>
+                <tr><td>[swac_showOnEmpty="{attribute}"]</td><td>Used for conditional hiding of elements. If the attribute is empty, element will be shown.</td></tr>
                 <tr><td>.swac_screencentered</td><td>Displays the element on the center of the screen.</td></tr>
                 <tr><td>.swac_onprint</td><td>Only shown in prints of page.</td></tr>
                 <tr><td>.swac_onscreen</td><td>Only shown when page is viewed on screen.</td></tr>