When you need to write javascript, create a plugin. Do not write your own code in global namespace your own js code should be unobtrusive. This plugin helps doing theese two steps.
$(document).ready(function() {
  $(this).drapper();
})
        
        Add jquery_drapper.js to the project. Mark DOM elements that you want to change with data-decorate attribute and initiate the plugin.
$.drappers = $.extend($.drappers, {
  mydrapper: function() {
    console.log("The special code, writing for html elements with drapper type 'myDrapper'");
    if(this.config.specialTactics) {
      $(this).css({
        border: '1px solid black'
      });
    }
    $(this).click(function() {
      $(this).hide();
    });
  }
})
        
        Drappers should be added in $.drappers object. Use jQuery.extend for adding a new drapper. Here is an example.
Here you could put a live example if your project happens to be something to do with web development, or maybe you could insert some images.