var nom = 'dominique';
var chez = '@';
var mondomaine = 'd-meeus';
var point = '.';
var domainesup = 'be';
document.write('<a href="mailto:');
document.write(nom+chez+mondomaine+point+domainesup+'">'+nom+'<span');
document.write(' style="color: black; font-weight: normal; font-size: smaller;');
document.write('">[chez]</span>'+mondomaine+'<span');
document.write(' style="color: black; font-weight: normal; font-size: smaller;');
document.write('">[point]</span>'+domainesup+'</a>');