Question:
How do we insert php code into javascript code?

Answer:
PHP is server-side code which means that the code is executed on the web server. The pages are dynamically created and sent to the user's browser.

JavaScript is a client-side code which means that it runs on the user's computer after the page has been sent from the server.

It is possible to combine PHP commands within JavaScript commands.

You would mainly use this in setting up starting variables for your JavaScript.

Example:
<script language='JavaScript'>
<!--
var BoxColor = <?php echo $color;?>;
…etc
-->
</script>

Another option is that you may consider using Ajax which allows you to dynamically call server-side code from JavaScript.

About the Author
Rich Agnew is an author for The Computer Geek Custom Web Page Design. The Computer Geek is a web design company that prides itself in professional service at a fraction of the cost. The Computer Geek specializes in Custom Web Design, PHP & MySql and Ecommerce.