<script type="text/javascript">

function isBlank(frm) {

  if(document.forms['container'].elements['c_cname'].value != "")
   {
   document.getElementById("erreur1a").innerHTML = 'OK';  
    return true;
   }
	else 
	{
   document.getElementById("erreur1b").innerHTML = '<?php echo TXT_CHAMP_NON_VIDE; ?>';
	}
}

</script> 