jquery.singularize.js

// jQuery UI sugar: an easy way to limit a plugin generated by the widget
// factory down to the first element. This is useful for widgets like dialog
// and mediaplayer that should be instantiated/configured individually.
$.widget.singularize = function(widgetName) {
	// Keep a reference to the auto-generated plugin, so that we can use it later
	var widget = $.fn[ widgetName ],
		slice = Array.prototype.slice;
		
	// Abort is widget doesn't exist to avoid creating random properties on $.fn
	if (!widget || !($.isFunction(widget))) {
		return;
	}
	
	// Re-define plugin
	$.fn[ widgetName ] = function() {
		// Only keep the first element in the set
		var self = this.eq( 0 ),
			// Normalize arguments object to true array
			args = slice.call( arguments );
					
		// Invoke the original plugin.
		return widget.apply( self, args );
	};
};