Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <link rel="stylesheet" href="../../code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css"> <script src="../../code.jquery.com/jquery-1.8.3.min.js"></script> <script src="../../code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script> </head> <body> <div data-role="page"> <div data-role="header"> <h1>Theming Collapsible Forms</h1> </div> <div data-role="content"> <form method="post" action="demoform.asp"> <fieldset data-role="collapsible" data-theme="b" data-content-theme="e"> <legend>Click me - I'm collapsible!</legend> <label for="name">Full Name:</label> <input type="text" name="text" id="name"> <p>Favorite Color:</p> <div data-role="controlgroup"> <label for="red">Red</label> <input type="checkbox" name="favcolor" id="red" value="red"> <label for="green">Green</label> <input type="checkbox" name="favcolor" id="green" value="green"> <label for="blue">Blue</label> <input type="checkbox" name="favcolor" id="blue" value="blue"> </div> <input type="submit" data-inline="true" value="Submit" data-theme="a"> </fieldset> </form> </div> </div> </body> </html>
Result:
W3Schools.com - Try it yourself