function validate() {
	error = false;
	if(document.getElementById('name').value == '')
		error = true;
	if(document.getElementById('email').value == '')
		error = true;
	if(document.getElementById('subject').value == '')
		error = true;
	if(document.getElementById('comments').value == '')
		error = true;

	if(error == true){
		alert ("Please fill in all fields.");
		return false;
	} else {
		return true;
	}
}