function fEml(add,dom,ext,cls,txt) {
	//obfuscate email link
	var eml = add
	var prot = 'mailto'
	var cssclass
	var linktext
	eml += '@' + dom
	eml += '.' + ext
	if(cls && cls!='') {
		//css class
		cssclass = ' class="' + cls + '"'
	}
	if(txt && txt!='') {
		//text to show in the link
		linktext = txt
	} else {
		linktext = eml
	}
	eml = '<a href="' + prot + ':' + eml + '"' + cssclass + '>' + linktext + '</a>'
	document.write(eml)
}