How show an background's imagen in a grid?

Hi, with SC 8.0 my grid shown an image of backfround, now with SC 8.1 does not shows nothing.
This is the code In Onscriptni.

print ("

<style type=‘text/css’>

body {
background-repeat: no-repeat;
background-image: url(…/_lib/img/fondo1.jpg);
}

a:link,
a:active,
a:visited {
color: #FFFFFF;
text-decoration: none;
}

a:hover {
color: #FFFFFF;
text-decoration: underline;
}

</style>

");

How Can i show an imagen in background in a grid?