jQuery: Equal heights custom script

equal-height.js

var $mainNavItem = jQuery('#mainNav .two-column-nav');

jQuery($mainNavItem).on('mouseover', function () {
  var mousedOver = jQuery.data(this, "mousedOver");

  if (!mousedOver) {
    var $this = jQuery(this);
    var height = 0;

    $siblings = $this.find('li.level2');

    for (var i = 0; i < $siblings.length; i++) {
      $sibling = $($siblings[i]);

      if ( $sibling.height() > height)
        height =  $sibling.height();
    }

    for (var i = 0; i < $siblings.length; i++) {
      $($siblings[i]).css('height', height + 'px');
    }

    jQuery.data(this, "mousedOver", true);
  }
});