function formValidation () {
	
	var forename = document.getElementById('forename').value;
	var surname  = document.getElementById('surname').value;
	var addressone  = document.getElementById('addressone').value;
	var addresstwo = document.getElementById('addresstwo').value;
	var address_town = document.getElementById('address_town').value;
	var postcode = document.getElementById('postcode').value;
	var phone = document.getElementById('phone').value;
	var email = document.getElementById('email').value;
	var property_type = document.getElementById('property_type').selectedIndex;
	var tenure = document.getElementById('tenure').value;
	var question = document.getElementById('question').value.toUpperCase();
	var errorCount = 0;
	 
	
	if (surname != ''){
		document.getElementById('errorsurname').src = "erroroff.jpg";
	}else{
		document.getElementById('errorsurname').src = "erroron.jpg";
		errorCount++;
	}
	if (addressone != ''){
		document.getElementById('erroraddressone').src = "erroroff.jpg";
	}else{
		document.getElementById('erroraddressone').src = "erroron.jpg";
		errorCount++;
	}
	if (postcode != ''){
		document.getElementById('errorpostcode').src = "erroroff.jpg";
	}else{
		document.getElementById('errorpostcode').src = "erroron.jpg";
		errorCount++;
	}
	if (phone != ''){
		document.getElementById('errorphone').src = "erroroff.jpg";
	}else{
		document.getElementById('errorphone').src = "erroron.jpg";
		errorCount++;
	}
	if (property_type != '0'){
		document.getElementById('errorproperty_type').src = "erroroff.jpg";
	}else{
		document.getElementById('errorproperty_type').src = "erroron.jpg";
		errorCount++;
	}
	if (question == 'BLUE'){
		document.getElementById('errorquestion').src = "erroroff.jpg";
	}else{
		document.getElementById('errorquestion').src = "erroron.jpg";
		errorCount++;
	}
	
	
	
	
	if (errorCount == 0){
		return true;
	} else	{
		return false;}
	}