Hello, Major. It looks like this:
<body> <wicket:extend> <div wicket:id="feedback" class="error"> </div> <br/><br/><br/> <form wicket:id="form"> .... </form> </wicket:extend> </body> and the CSS is: .error { width: auto; margin-left: 25%; margin-right: 25%; border: 1px solid #fc908c; background-image: url('../pictures/icons/error_64x64.png'); background-color: #ffeceb; } You can view the bookmark on the link provided above (vostrets.ru/register/) - just open the page in Firefox, right click and "View page source".