HTML Scripts
Add scripts to HTML pages to make them more dynamic and
interactive.
Examples
Insert a script
This example demonstrates how to insert a script into your HTML document.
Work with browsers that do not support scripts
This example demonstrates how to handle browsers that do not support scripting.
Insert a Script into HTML Page
A script in HTML is defined with the <script> tag. Note that you will
have to use the type attribute to specify the scripting language.
<html>
<body>
<script type="text/javascript">
document.write("Hello World!")
</script>
</body>
</html>
|
The script above will produce this output:
Hello World!
Note: To learn more about scripting in HTML, visit our JavaScript
School.
How to Handle Older Browsers
A browser that does not recognize the <script> tag at all, will display
the <script> tag's content as text on the page. To prevent the browser from
doing this, you should hide the script in comment tags. An old browser (that does not
recognize the <script> tag) will ignore the comment and it will not write
the tag's content on the page, while a new browser will understand that the
script should be executed, even if it is surrounded by comment tags.
Example
JavaScript:
<script type="text/javascript">
<!--
document.write("Hello World!")
//-->
</script>
VBScript:
<script type="text/vbscript">
<!--
document.write("Hello World!")
'-->
</script>
|
The <noscript> Tag
In addition to hiding the script inside a comment, you can also add a <noscript>
tag.
The <noscript> tag is used to define an alternate text if a
script is NOT executed. This tag is used for browsers that recognize the
<script> tag, but do not support the script inside, so these browsers will
display the text inside the <noscript> tag instead. However, if a browser supports
the script inside the <script> tag it will ignore the <noscript>
tag.
Example
JavaScript:
<script type="text/javascript">
<!--
document.write("Hello World!")
//-->
</script>
<noscript>Your browser does not support
JavaScript!</noscript>
VBScript:
<script type="text/vbscript">
<!--
document.write("Hello World!")
'-->
</script>
<noscript>Your browser does not support VBScript!</noscript>
|
Script Tags
| Tag |
Description |
| <script> |
Defines a script |
| <noscript> |
Defines an alternate text if the script is not executed |
| <object> |
Defines an embedded object |
| <param> |
Defines run-time settings (parameters) for an object |
| <applet> |
Deprecated. Use <object> instead |
Start Creating a stunning, Flash website. It's easy and free!
Wix is a revolutionary web design tool that provides you with a free, simple,
drag & drop editing platform to create your own professional and beautiful website.
Over 2 Million users have created their website with Wix.
Now create yours!
 |
W3Schools' Online Certification Program
The perfect solution for professionals who need to balance work, family, and career building.
More than 4000 certificates already issued!
|
The HTML Certificate documents your knowledge of HTML, XHTML, and CSS.
The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.
The XML Certificate documents your knowledge of XML, XML DOM and XSLT.
The ASP Certificate documents your knowledge of ASP, SQL, and ADO.
The PHP Certificate documents your knowledge of PHP and SQL (MySQL).
| 
Chinese Version