Hello Stef,
If you want to set background-image for content part of jqxWindow, please find the following example which shows how you can achieve it.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html lang="en">
<head>
<title></title>
<link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
<script type="text/javascript" src="../../scripts/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxwindow.js"></script>
</head>
<body>
<div id='content'>
<script type="text/javascript">
$(document).ready(function () {
$("#jqxwindow").jqxWindow({ height: 120, width: 200 });
});
</script>
<div id='jqxwindow'>
<div>Header</div>
<div style="background-image: url(../../../images/bookshop.png); height: 83px; width: 183px; background-repeat: no-repeat; border: 1px solid black;">Content</div>
</div>
</div>
</body>
</html>
Best Regards,
Nadezhda
jQWidgets team
http://www.jqwidgets.com/