function cvtcode() { 
if (event.keyCode < 48 || event.keyCode > 57)
{
event.returnValue = false;
}
}

 function control2(form1) {
	    if (form1.nom.value == "" ) {
		alert("Please enter your name.");
		form1.nom.focus();
		return false;
		}   
	    if (form1.secteur_activite.value == "" ) {
		alert("Please select your activity.");
		form1.secteur_activite.focus();
		return false;
		} 
		if (form1.email.value == "" || form1.email.value.indexOf('@',1)== -1 || form1.email.value.indexOf('.',2)==-1){
		alert("Please enter your e-mail");
		form1.email.focus();
		return false;
	}
	if (form1.message.value == "" ) {
		alert("Please enter your request.");
		form1.message.focus();
		return false;
		} 
		 
	return true ;
	}