function showImage(pageName,imageGroup,numImages) {
	var j = 0;
	var p = numImages-1;
	
	var whichImage = (Math.round(Math.random()*(p)))+1;

	var str = '<style type="text/css"><!-- ';
		str += '@import url("/associations/9200/files/stylesheets/aia_';
		str += pageName;
		str += '.css");';
		str += 'ul#navtop2 { background: transparent url(/associations/9200/files/banner'+imageGroup+'/banner'+imageGroup+'_';
		str += whichImage;
		str += '.jpg) no-repeat center bottom; height: 128px;}';
		str += ' --></style>';
	
	document.write(str);	
}