function checkForm()
{
	with (window.document.frmCheckout) {
		if (isEmpty(customername, 'Enter your name')) {
			return false;
		} else if (isEmpty(jobname, 'Enter a job name')) {
			return false;
		} else if (isEmpty(email, 'Enter email address')) {
			return false;
		} else if (isEmpty(comments, 'Enter comments')) {
			return false;
		} else if (isEmpty(uploadedfile, 'Please choose a file to upload.')) {
			return false;
		} else {
			return true;
		}
	}



function isEmpty(formElement, message) {
	formElement.value = trim(formElement.value);
	
	_isEmpty = false;
	if (formElement.value == '') {
		_isEmpty = true;
		alert(message);
		formElement.focus();
	}
	
	return _isEmpty;
}