ajouter un attribut title de css

Comment ajouter title= "obligatoires" de css à la suite de

     <label class='mandatory'>Name</label>

.mandatory
{
background-image:url(/media/img/required.gif);
background-position:top right;
background-repeat:no-repeat;
padding-right:10px;
font-weight:bold;
}
InformationsquelleAutor Rajeev | 2011-05-26