<link href="//netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="navbar-inner"> <div class="container" style="width: auto;"> <a class="brand" href="#">JavaScript</a> <ul class="nav" role="navigation"> <li class="dropdown"> <a id="drop1" href="#" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a> <ul class="dropdown-menu" role="menu" aria-labelledby="drop1"> <li><a tabindex="-1" href="http://google.com">Action</a> </li> <li><a tabindex="-1" href="#anotherAction">Another action</a> </li> <li><a tabindex="-1" href="#">Something else here</a> </li> <li class="divider"></li> <li><a tabindex="-1" href="#">Separated link</a> </li> </ul> </li> <li class="dropdown"> <a href="#" id="drop2" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown 2 <b class="caret"></b></a> <ul class="dropdown-menu" role="menu" aria-labelledby="drop2"> <li><a tabindex="-1" href="#">Action</a> </li> <li><a tabindex="-1" href="#">Another action</a> </li> <li><a tabindex="-1" href="#">Something else here</a> </li> <li class="divider"></li> <li><a tabindex="-1" href="#">Separated link</a> </li> </ul> </li> </ul> <ul class="nav pull-right"> <li id="fat-menu" class="dropdown"> <a href="#" id="drop3" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown 3 <b class="caret"></b></a> <ul class="dropdown-menu" role="menu" aria-labelledby="drop3"> <li><a tabindex="-1" href="#">Action</a> </li> <li><a tabindex="-1" href="#">Another action</a> </li> <li><a tabindex="-1" href="#">Something else here</a> </li> <li class="divider"></li> <li><a tabindex="-1" href="#">Separated link</a> </li> </ul> </li> </ul> </div> </div> </div> <p>The beauty of this implementation is that the menu drops down only after the mouse rests over it for a little while. If you just move over the menu, nothing happens so you don't get distracted. </p> <p>Compare it over a <a href="http://jsfiddle.net/ekjxu/" target="_top">CSS Only implementation</a> where menus fall down immediately.</p>

(function ($, window, delay) { // http://jsfiddle.net/AndreasPizsa/NzvKC/ var theTimer = 0; var theElement = null; var theLastPosition = {x:0,y:0}; $('[data-toggle]') .closest('li') .on('mouseenter', function (inEvent) { if (theElement) theElement.removeClass('open'); window.clearTimeout(theTimer); theElement = $(this); theTimer = window.setTimeout(function () { theElement.addClass('open'); }, delay); }) .on('mousemove', function (inEvent) { if(Math.abs(theLastPosition.x - inEvent.ScreenX) > 4 || Math.abs(theLastPosition.y - inEvent.ScreenY) > 4) { theLastPosition.x = inEvent.ScreenX; theLastPosition.y = inEvent.ScreenY; return; } if (theElement.hasClass('open')) return; window.clearTimeout(theTimer); theTimer = window.setTimeout(function () { theElement.addClass('open'); }, delay); }) .on('mouseleave', function (inEvent) { window.clearTimeout(theTimer); theElement = $(this); theTimer = window.setTimeout(function () { theElement.removeClass('open'); }, delay); }); })(jQuery, window, 200); // 200 is the delay in milliseconds