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JavaScript Objects HTML DOM ObjectsJavaScript HTML DOM - Changing CSS
The HTML DOM allows JavaScript to change the style of HTML elements.
Changing HTML Style
To change the style of an HTML element, use this syntax:
document.getElementById(id).style.property=new style
The following example changes the style of a <p> element:
Example
<html>
<body>
<p id="p2">Hello World!</p>
<script>
document.getElementById("p2").style.color="blue";
</script>
<p>The paragraph above was changed by a script.</p>
</body>
</html>
<body>
<p id="p2">Hello World!</p>
<script>
document.getElementById("p2").style.color="blue";
</script>
<p>The paragraph above was changed by a script.</p>
</body>
</html>
Try it yourself »
This example changes the style of the HTML element with id="id1", when the user clicks a button:
Example
<!DOCTYPE html>
<html>
<body>
<h1 id="id1">My Heading 1</h1>
<button type="button"
onclick="document.getElementById('id1').style.color='red'">
Click Me!</button>
</body>
</html>
<html>
<body>
<h1 id="id1">My Heading 1</h1>
<button type="button"
onclick="document.getElementById('id1').style.color='red'">
Click Me!</button>
</body>
</html>
Try it yourself »
More Examples
Visibility
How to make an element invisible. Do you want the element to show or not?
HTML DOM Style Object Reference
For all HTML DOM style properties, look at our complete HTML DOM Style Object Reference.
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