auto. script elements, active. Accessibility of web content requires semantic information about widgets, structures, and behaviors, in order to allow assistive technologies to convey appropriate information to persons with disabilities. Replaced elements with an intrinsic aspect ratio use that aspect ratio, otherwise the box has no preferred aspect ratio. X:visited and X:link a:link { color: red; } a:visited { color: purple; } We use the :link pseudo-class to target all anchor tags which have yet to be clicked on. Bind an event handler to the select JavaScript event, or trigger that event on an element. How to get specific number of child elements using CSS? Wikipedia What is the best way to include CSS file? In HTML, we can use the hidden attribute to hide the specified element. It's a great way to build that data collection to get the real values of what's in the form. Selection methods accept W3C selector strings such as .fancy to select elements with the class fancy, or div to select DIV elements. In CSS, selectors declare which part of the markup a style applies to by matching tags and attributes in the markup itself. We are hiding the div element by applying the style.display property, and hiding the