#texte_content { 
font-size : 12px;
} 

.texte_content { 
font-size : 12px;
} 

Output has already been sent to the browser at /homez.130/otidea/www/gdtarbes/Modules/annuaire_front/annuaire_front.php:79.
Please make sure the command $xajax->processRequest() is placed before this.