Решено таким способом
<SCRIPT LANGUAGE="javascript">
function getClientHeight()
{
return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientHeigh t:document.body.clientHeight;
}
var h = getClientHeight();
var height = h - 90 + 'px';
document.write("<div id='galleria' style=' height: " + height + "';>");
</SCRIPT>