//email
function writeEmail(email_mailbox, email_host, email_show, email_class) 
{
	emailE=(email_mailbox + '@' + email_host);
	if (!email_show) email_show = emailE;
	if (email_class) email_class = ' class="'+email_class+'"'
	else email_class = '';
	document.write('<a' + email_class + ' href="mailto:' + emailE + '">' + email_show + '</a>');
}