function ValidateForm(form) {

	if (form.email.value == '') { }
		else {
		crucial = form.email.value.indexOf ("@");
		dotcrucial = form.email.value.indexOf (".");
		if(crucial == -1 || dotcrucial == -1) {
			alert('You did not enter your Email correctly.');
			form.email.focus();
			return false } 
		}

	if (form.letter.value == '') { 
		alert('You must write an email message.');
		form.letter.focus();
		return false }

}