function valida()
{
	var name = document.frmreserva.nombres;
	var emailpax = document.frmreserva.email;
	if(name.value == '')
	{	
		alert("Please fill your Name");	
		name.focus();
		return;
	}
	
	if(emailpax.value == '' || emailpax.value.indexOf('@',0) == -1 || emailpax.value.indexOf('.',0) == -1)
	{	
		alert("Please fill a correct EMail");	
		emailpax.value='';
		emailpax.focus();
		return;
	}
	
	if(document.frmreserva.ciudad.value == '')
	{	
		alert("Please fill your City");	
		document.frmreserva.ciudad.focus();
		return;
	}
	
	if(document.frmreserva.comentarios.value == '')
	{	
		alert("Please fill your Requeriments");	
		document.frmreserva.comentarios.focus();
		return;
	}
	document.frmreserva.submit();	
}