function codeTouche(evenement)
{
		for (prop in evenement)
		{
				if(prop == 'which') return(evenement.which);
		}
		return(evenement.keyCode);
}
function scanTouche(evenement)
{
		var reCarSpeciaux = /[\x00\x08\x0D\x03\x16\x18\x1A]/;
		var reCarValides = /\d/;

		var codeDecimal  = codeTouche(evenement);
		var car = String.fromCharCode(codeDecimal);
		var autorisation = reCarValides.test(car) || reCarSpeciaux.test(car);

		return autorisation;
}