tripal/legacy/tripal_feature/theme/js/tripal_feature.js

(function($) {
  Drupal.behaviors.tripal_featureBehavior = {
    attach: function (context, settings){

      // the following function is used when viewing sequence alignments
      // on the feature page. When mousing over the feature type legend
      // it should highlight regions in the sequence
      $('.tripal_feature-legend-item').bind("mouseover", function(){
        var classes = $(this).attr('class').split(" ");
        var type_class = classes[1];       

        $("." + type_class).css("border", "1px solid red");
        $(this).bind("mouseout", function(){
          $("." + type_class).css("border", "0px");
        })    
      });
    }
  };
})(jQuery);