'className' Example
<html> <head> <script language="JavaScript"> function function1() { document.getElementById("myP").className = "myC" } </script> <style> .myC { font-family:verdana, arial; font-weight:bold; font-size:16px; } </style> </head> <body> <p id="myP" style="text-decoration:underline; cursor:hand;" onclick="function1()"> Render this text using the myC class</p> </body> </html>