function validateForm() {

document.enquiryform.sendbutton.disabled = true; 
document.enquiryform.sendbutton.value = 'Please wait...';

if (document.enquiryform.name.value.length < 2) {
	alert('Please enter your name');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else if (document.enquiryform.address.value.length < 2) {
	alert('Please enter your address');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else if (document.enquiryform.city.value.length < 2) {
	alert('Please enter your city');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else if ((document.enquiryform.postcode.value.length < 6) || (document.enquiryform.postcode.value.length > 8)) {
	alert('Please enter a valid post code');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else if (document.enquiryform.phone.value.length < 2 && document.enquiryform.email.value.length < 2) {
	alert('Please enter a contact number or e-mail address');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else if (document.enquiryform.enquiry.value.length < 2) {
	alert('Please tell us what you are enquiring about');
	document.enquiryform.sendbutton.disabled = false; 
	document.enquiryform.sendbutton.value = 'Send';
}
else {
	document.enquiryform.submit();
}

}