jquery-based function for displaying a popin/menu on hover

popinOnHover.js

// generic function for displaying a menu element when hovering on an other element
function popinOnHover(hoverElement, menuElementOrFunction){
  var $menuElement = typeof menuElementOrFunction !== 'function' ? $(menuElementOrFunction) : null;
  var hoveredZones = 0;
  function hideIfNotHovered(){
    if (!hoveredZones){
      if (typeof menuElementOrFunction === 'function') {
        $menuElement = menuElementOrFunction(false);
      }
      else
        $menuElement.hide();
    }
  }
  function leave(){
    hoveredZones--;
    setTimeout(hideIfNotHovered, 100);
  }
  function hover(){
    hoveredZones++;
  }
  function showPopin(){
    if (typeof menuElementOrFunction === 'function')
      $menuElement = $(menuElementOrFunction(this));
    $menuElement
      .css($(this).position())
      .mouseenter(hover)
      .mouseleave(leave)
      .show();
  }
  $(hoverElement)
    .mouseenter(hover)
    .mouseenter(showPopin)
    .mouseleave(leave);
}

// sample use:

function togglePopin(hoveredElement){
  var $popin = $('.notif-popin');
  if (!hoveredElement) {
    $popin.remove();
    return null;
  }
  if (!$popin.length) {
    $popin = $('<div class="notif-popin"></div>').appendTo($body);
  }
  populatePopin($popin, hoveredElement);
  return $popin;
}

popinOnHover($('#hoverElement1, #hoverElement2'), togglePopin);