function CheckSendMail(frmForm)
{
	var boolReturn = true;
	var strSender_name = frmForm.Sender_name.value;
	var strSender_email = frmForm.Sender_email.value;
	var strContact_Country = frmForm.Country.value;
	var strContact_Hotel_or_Guesthouse = frmForm.Hotel_or_Guesthouse.value;
	var strContact_Telephone = frmForm.Telephone.value;
	//var strContact_Course = frmForm.Course.value;
	var strContact_Person = frmForm.Person.value;
	var strContact_Date_of_course = frmForm.Date_of_course.value;
	var strContact_Date_of_arrival_in_Chiang_Mai = frmForm.Date_of_arrival_in_Chiang_Mai.value;

	if(strSender_name.length == 0)
	{
		boolReturn = false;
		alert("Please enter your name");
		frmForm.Sender_name.focus();
	}
	else if(strSender_email.length == 0)
	{
		boolReturn = false;
		alert("Please enter your e-mail address");
		frmForm.Sender_email.focus();
	}
	else if(strContact_Country.length == 0)
	{
		boolReturn = false;
		alert("Please enter your country");
		frmForm.Country.focus();
	}
	else if(strContact_Hotel_or_Guesthouse.length == 0)
	{
		boolReturn = false;
		alert("Please specify hotel or guesthouse");
		frmForm.Hotel_or_Guesthouse.focus();
	}
	else if(strContact_Telephone.length == 0)
	{
		boolReturn = false;
		alert("Please enter your telephone");
		frmForm.Telephone.focus();
	}
	else if(strContact_Date_of_course.length == 0)
	{
		boolReturn = false;
		alert("Please enter your date of course");
		frmForm.Date_of_course.focus();
	}
	else if(strContact_Date_of_arrival_in_Chiang_Mai.length == 0)
	{
		boolReturn = false;
		alert("Please enter your date of arrival in  Chiang Mai");
		frmForm.Date_of_arrival_in_Chiang_Mai.focus();
	}
	return boolReturn;
}