function isNumber() {
	// Compatibilité IE / Firefox
	if(!event&&window.event) {
		event=window.event;
	}
	// IE
	if(event.keyCode < 48 || event.keyCode > 57) {
		event.returnValue = false;
		event.cancelBubble = true;
	}
	// DOM
	if(event.which < 48 || event.which > 57) {
		event.preventDefault();
		event.stopPropagation();
	}
}

function isWord() {
	// Compatibilité IE / Firefox
	if(!event&&window.event) {
		event=window.event;
	}
	// IE
	if(event.keyCode > 48 && event.keyCode < 57) {
		event.returnValue = false;
		event.cancelBubble = true;
	}
	// DOM
	if(event.which > 48 && event.which < 57) {
		event.preventDefault();
		event.stopPropagation();
	}
}

function check() {
	var msg = "";

	// Checking the mail address
	if (document.formulaire.email.value != "")	{
		indexAroba = document.formulaire.email.value.indexOf('@');
		indexPoint = document.formulaire.email.value.indexOf('.');
			if ((indexAroba < 0) || (indexPoint < 0))		{
				document.formulaire.email.style.backgroundColor = "#F3C200";
				msg += "Your mail address is not correct.\n";
				document.formulaire.send.disabled="disabled";
			}
			else {
				document.formulaire.email.style.backgroundColor = "#FFFFFF";
				document.formulaire.send.disabled="";
			}
	}
	
	if (msg == "") return(true);
	else{
		alert(msg);
		return(false);
	}
}