function check_input(){
    var message_alert = "";
	obligatoires = new Array('mail');
	libObligatoires = new Array("Votre adresse email");

    for(var i = 0; i < window.document.forms['mailing'].length ; i++) {				
       	var rechRapide = window.document.forms['mailing'].elements[i].value;
       	var nom_champ = window.document.forms['mailing'].elements[i].name;				   
       	//window.document.forms['mailing'].elements[i].className = "inblur";				   
	   	var tag = 0;
	   	for(var j=0; j<obligatoires.length; j++){
	   		if (obligatoires[j] == nom_champ){
				lib_champ = libObligatoires[j];
				tag = 1;
				break;
			}
		}
		if (tag == 1){
	       	if(rechRapide == "") {
	        	window.document.forms['mailing'].elements[i].focus();
				window.document.forms['mailing'].elements[i].style.backgroundColor="#F9CAAA";
	          	window.document.forms['mailing'].elements[i].className = "inputnonvalide";							
	          	message_alert +=" Veuillez remplir le champ " + lib_champ +"\n";
	       	}else{
				if(nom_champ == 'mail'){
					if ((rechRapide.indexOf('@',0)==-1) || (rechRapide.indexOf('.',0)==-1)) {
						message_alert +=" Votre adresse email est invalide\n";
					}
				}			
			}
		}
    }	
    if (message_alert == "") {
    	window.document.forms['mailing'].submit();
    } else {
      	message_alert = "Informations nécessaires au traitement de votre demande : \n" + message_alert;
       	alert(message_alert);
       	return false;
    }
}