function valid_enquiry()
{
	if(document.enquiryForm.name.value == "")
	{
		alert("Please give your name");
		return false;
	}
	else if(document.enquiryForm.email.value == "")
	{
		alert("Please give your email address");
		return false;
	}
	else if(document.enquiryForm.comment.value == "")
	{
		alert("Please enter your enquiry");
		return false;
	}
	else if(document.enquiryForm.security_code.value == "")
	{
		alert("Please enter the security code");
		return false;
	}

	return true;
}