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

function resetBox(input) {
	if(!input.value) {
		input.value = input.defaultValue;	
	}
}
/*
function validateField(myField, type) {
	var contents = get(myField).value;
	var errorNotification = 'e'+ myField;
	if(type == 'email') { // email field
		// validate against invalid email addresses
		if ((/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(contents))){
			get(errorNotification).style.visibility='hidden';
		} else {
			get(errorNotification).style.visibility='visible';
		}
	} else if(type == 'basic') { // compulsory - at least 1 character
		// basic validation against empty fields which are deemed compulsory
		if(contents != '') {
			get(errorNotification).style.visibility='hidden';
		} else {
			get(errorNotification).style.visibility='visible';
		}
	}
}*/

function empty(value) {
	if(value == '' || value == false || value == null || value == 0) {
		return true;
	} else {
		return false;
	}
}

function get(eid) {
	return document.getElementById(eid);
}
function generateInvoice(myForm) {
	var error = 0;
	var errorMessage = '';

	var name = get('name').value;
	var email = get('email').value;
	var terms = get('terms').checked;
	var focusField = '';

	if(empty(name)) {
		error = 1;
		focusField = 'name';
		errorMessage += 'Please enter your name.';
	} else if (!(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(email))){
		error = 1;
		focusField = 'email';
		errorMessage += 'Please enter a valid email address.';
	} else if(empty(terms)) {
		error = 1;
		focusField = 'terms';
		errorMessage += 'You must accept the terms and conditions.';
	}
	if(error == 1) {
		alert(errorMessage);
		//var errorIcon = 'e'+focusField;
		//get(errorIcon).style.visibility='visible';
		// focus on error field if focus field provided
		get(focusField).style.backgroundColor='#FEFFE5';
		get(focusField).focus();
		return false;
	} else {
		//alert("here");
		get(myForm).submit();
		return true;
	}
}