Code
<script type="text/javascript">
function shapka(n)
{document.write('<img border="0" src="' + n + '" border="0">');}
var h=(new Date()).getHours();
if (h > 6 && h < 21) {
sha=Math.floor(Math.random() * 2);
shapka('http://samp-pawno.ru/logos/logo'+sha+'.jpg');
}
if (h > 21 || h <7) shapka('http://samp-pawno.ru/logos/Night_logo.jpg');
</script>