uses the html-field extension

Single Checkbox example

// for illustration only. need refactoring as it shows a non-exsistant defined group by sending an empty string to show

// add groups
ADMIN_SHOW_HIDE.addFieldGroup('Gallery Images', ['Images']);

function debugField (selector) {
	objectForSymphonyLabel(selector).addClass('debug');
}

// actions
jQuery(document).ready( function ($) {

	 var select = 'input:[name=fields[use-main-gallery]]';
	
	// show initially selected group
	ADMIN_SHOW_HIDE.showFieldGroup( $(select).val() );
	
	// add event
	$(select).change( function () {
		checkStatus();
	})
	
	function checkStatus () {
	
		if($(select).attr('checked')) {
			ADMIN_SHOW_HIDE.showFieldGroup( "" );
		} else {
			ADMIN_SHOW_HIDE.showFieldGroup( "Gallery Images" );
		}
		
	}
	
	checkStatus();

});

Symphony-CMS Feild Collection Sets

<style type="text/css">
<!--
.field-html_panel  {
	display: none;
}

.debug {
	border: 1px solid red;
}
-->
</style>

<script type="text/javascript">
<!--

// @issues	 selecting the symphony field can be a bit to generic


// @todo	make this into an extension
ADMIN_SHOW_HIDE = new (function ($) {
	// private
	var self = this,
		fieldGroups = new Array();
	
	// public
	
	// @param	title		string		Name of the group
	// @param	selectors	string		Symphony Item Label
	// @param	selectors	array		Symphony Item Labels
	this.addFieldGroup = function (title, selectors) {
		if (typeof selectors == 'string') selectors = [selectors];
		var group = {'title' : title, 'selectors' : selectors};
		fieldGroups.push(group);
	}
	
	// @param	title	string		Name of the group
	this.showFieldGroup = function (title) {
		for (var i = 0; i < fieldGroups.length; i++) {
			if (fieldGroups[i].title == title) {
				change(fieldGroups[i], 'show');
			} else {
				change(fieldGroups[i], 'hide');
			}
		}
	}
	
	// @param	group		array	fieldGroups group
	// @param	mode		string	jQuery function i.e. 'show', 'hide'
	function change(group, mode) {
		for (var i = 0; i < group.selectors.length; i++) {
			var object = objectForSymphonyLabel(group.selectors[i]) [mode] ();
		}
	}
	
	function objectForSymphonyLabel(labelTitle) {
		var $selection = $('.field:has(label:contains(\'' + labelTitle + '\'))');
		if ($selection.length > 1) jQuery.error('objectForSymphonyLabel: label to generic, returning more that one jQuery object. may cause errors');
		return $selection;
	}
	
	
})(jQuery);


// custom

// add groups
ADMIN_SHOW_HIDE.addFieldGroup('Director Profile', ['Genres', 'Director Videos', 'Biography']);
ADMIN_SHOW_HIDE.addFieldGroup('Link', 'Link URL');

function debugField (selector) {
	objectForSymphonyLabel(selector).addClass('debug');
}

// actions
jQuery(document).ready( function ($) {

	 var $select = $('select:[name=fields[entry-type]]');
	
	// show initially selected group
	ADMIN_SHOW_HIDE.showFieldGroup( $select.val() );
	
	// add event
	$select.change( function () {
		ADMIN_SHOW_HIDE.showFieldGroup( $(this).val() );
	})

});



-->
</script>