Event Helpers

jQuery offers two event-related helper functions that save you a few keystrokes.

`$.fn.hover`

The $.fn.hover method lets you pass one or two functions to be run when the mouseenter and mouseleave events occur on an element. If you pass one function, it will be run for both events; if you pass two functions, the first will run for mouseenter, and the second will run for mouseleave.

Prior to jQuery 1.4, the $.fn.hover method required two functions.

                
                                // The hover helper function
                              
                              $("#menu li").hover(function() {
                            
                                $( this ).toggleClass("hover");
                            
                              });

`$.fn.toggle`

The $.fn.toggle method is triggered by the "click" event and accepts two or more functions. Each time the click event occurs, the next function in the list is called. Generally, $.fn.toggle is used with just two functions; however, it will accept an unlimited number of functions. Be careful, though: providing a long list of functions can be difficult to debug.

                
                                // The toggle helper function
                              
                              $("p.expander").toggle( function() {
                            
                                $( this ).prev().addClass("open");
                            
                              }, function() {
                            
                                $( this ).prev().removeClass("open");
                            
                              });

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