var d = new Date();
var time = d.getHours();

if (time < 7 || time > 19) 
{
	document.write('<a href="http://validator.w3.org/check?uri=referer"><img style="border:0; width:88px; height:31px" src="pictures/xhtml10-blue.png" title="www.rebe.cc is valid XHTML 1.0" alt="Valid XHTML 1.0 Transitional" /></a>');
}
else
{
	document.write('<a href="http://validator.w3.org/check?uri=referer"><img style="border:0; width:88px; height:31px" src="pictures/xhtml10.png" title="www.rebe.cc is valid XHTML 1.0" alt="Valid XHTML 1.0 Transitional" /></a>');
}