function clearBox(input) {
	if(input.value=input.defaultValue) {
		input.value = '';	
	}
}

function resetBox(input) {
	if(!input.value) {
		input.value = input.defaultValue;	
	}
}

function validateSignup(myForm, defval){
	var myName = myForm.email.value;
	error = 0;
	
	if(myName == '' || myName == defval ) {
		error = 1;
	}
	
	if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myName))){
		error = 1;
	}
	
	if(error == 1){
		alert('Please ensure that the email address you have entered is valid.');
		return false;
	}
	else {
		return true;
	}
}


function validateRequest(myForm){
	var myName = myForm.name.value;
	var myAddress = myForm.address.value;
	var myEmail = myForm.email.value;
	var myPostcode = myForm.postcode.value;
	error = 0;
	
	if(myName == '' || myAddress == '' || myEmail == '' || myPostcode == '') {
		error = 1;
	}
	
	if(!(myEmail == '')){
		 if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(myEmail))){
			error = 1;
		 }
	}
	
	
	if(error == 1){
		alert('Please ensure that all details are correct and try again.');
		return false;
	}
	else {
		return true;
	}
}