function cover_leveel(a,b,c,d) {
	document.write("<a class=\"mail\" href=\"mailto:" + a + "@" + b + "." + c + "\">" + d + "</a>");
}
function cover2_leveel(a,b,c) {
	document.write("<a href=\"mailto:" + a + "@" + b + "." + c + "\">" + a + "@" + b + "." + c + "</a>");
}