# JavaScript HTML DOM - Changing CSS

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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>
Try it Yourself »

## Using Events

The HTML DOM allows you to execute code when an event occurs.

Events are generated by the browser when "things happen" to HTML elements:

- An element is clicked on
- The page has loaded
- Input fields are changed

You will learn more about events in the next chapter of this tutorial.

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>
Try it Yourself »

## More Examples

Visibility How to make an element invisible. Do you want to show the element 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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