function onlyNumber() {
/*
	var tecla = event.keyCode;
	var obj = event.srcElement;
	var num = "0123456789";
	var realKey = String.fromCharCode(tecla);
	
	alert(isNaN(tecla));
	
	if ((num.indexOf(realKey) == -1 && tecla != 8) || (obj.readOnly == true)) {
		event.returnValue = false;
		return false;
	}
*/
}