function set_m (first, second, subject, text) {
// e-mail: mijnuser@mijndomein.com
//		set_m('mijnuser','mijndomein.com', 'mijn onderwerp','mijntext')
    pre = "mail";
    url = pre + "to:" + first;
	
	mymail = url + "@" + second;
	if(subject == "") subj= "";
	else subj = "?subject=" + subject;
	if(text == "") mytext = first + "@" + second;
	else mytext = text;
    document.write('<a href="' + mymail + subj +'">' + mytext + '</A>');
}