function addCssRules(selector, rules, /*Optional*/ sheetName) ', styleSheet.cssRules. Works with FF, Chrome, and IE9+ (maybe earlier too, untested). Use the HTML tags, ,, and in this exercise. firstpage.html) that specifies a page that contains a heading and two paragraphs of text. In these exercises, however, we’ll just concentrate on HTML. It will make at most one new style element and re-use it on future function calls). use another language called CSS to specify how the content of a web page looks like on the screen. To modify each element in our HTML file, we can select them using ids, classes or the tag names themselves, though the last. Here's my general-purpose function which parametrizes the CSS selector and rules, and optionally takes in a css filename (case-sensitive) if you wish to add to a particular sheet instead (otherwise, if you don't provide a CSS filename, it will create a new style element and append it to the existing head. Now we have the CSS, in other words, the style of our page.
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