Mura CMS : In 6.1, you will be able to define your own display events via 'display=someAction'

onDisplayRender.cfc

<cfscript>
// you can even trigger the display event
$.event('display', 'help');

// place this in your Site or Theme eventHandler.cfc
public any function onDisplayRender($) {
	var str = '';
	switch(arguments.$.event('display')) {
		case 'someAction' :
			try {
				savecontent variable='str' {
					include '#arguments.$.siteConfig('themeAssetPath')#/display_objects/someAction.cfm';
				}
			} catch(any e) {
				str = '<p>missing file</p>';
			}
			break;
		case 'help' :
			str = '<h1>Hey, you asked for HELP!</h1>';
			break;
		default : 
			str = '';
	}
	return str;
}
</cfscript>