The DOM for a web page provides a hierarchy of nodes that represent the elements, contents, and attributes in the HTML the elements, attributes, and comments in the HTML the contents, attributes, and comments in the HTML the elements, contents, attributes, and comments in the HTML Which of the following is NOT a common mistake when using a JavaScript function that is in an external file? Forgetting to code a script element for including the JavaScript file Using id or class names that don't match the JavaScript requirements Using HTML elements that don't match the JavaScript requirements Using CSS properties that don't match the JavaScript requirements When you use JavaScript for tabbed data, the JavaScript changes the class attributes for the active and inactive tabs and the CSS sets the display property for the active tab to "yes" sets the display property for the inactive tabs to "none" gets the contents for the active tab removes the contents from the inactive tabs One way to find out whether a web page has JavaScript errors is to test it in Firefox and display the Error Console test it in IE and display the Error Console view the source code after it has been loaded to see whether it has been changed view the CSS for the web page to see whether it has been changed Many jQuery features require the use of these files: the jQuery core library, the jQuery UI library, and the jQuery UI stylesheet the JavaScript core library, the jQuery core library, and the jQuery UI library the jQuery core library, the jQuery UI library, and the jQuery stylesheet the JavaScript core library, the jQuery core library, and the jQuery UI stylesheet To call the jQuery accordion method for a div element that has "panel" as its id attribute, you would code this JavaScript: $ (".panel") accordion (): $(". accordion"). panel (): $("#panel"). accordion (): $("#accordion"). panel()