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// form and email validation

function validateComplete(formObj){
	if (emptyField(formObj.NAME)){
		alert("Please enter your name");
		formObj.NAME.focus();
		return false;
	}
	if (emptyField(formObj.EMAIL)){
		alert("Please enter your email address");
		formObj.EMAIL.focus();
		return false;
	}
	if (!validEmail(formObj.EMAIL.value)){
		alert("Please enter a valid email address");
		formObj.EMAIL.focus();
		return false;
	}
	if (emptyField(formObj.contact_telno)){
		alert("Please enter a contact telephone number");
		formObj.contact_telno.focus();
		return false;
	}
	if (formObj.GUESTS.value == "x"){
		alert("Please select the number of guests");
		formObj.GUESTS[0].focus();
		return false;
	}
	
	if (formObj.TERMSCONDITIONS.checked == false){
		alert("Please read the Terms and Conditions");
		formObj.TERMSCONDITIONS.focus();
		return false;
	}
	return true;
}

function emptyField(textObj){
	if (textObj.value.length == 0) return true;
	for (var i=0; i<textObj.value.length; ++i){
		var ch = textObj.value.charAt(i);
		if (ch != ' ' && ch != '\t') return false;
	}
	return true;
}

function validEmail(email){
	invalidChars = " /:,;"
	if (textObj = ""){
		return false;
	}		
	for (i=0; i<invalidChars.length; i++){
		badChar = invalidChars.charAt(i)
		if (email.indexOf(badChar,0) != -1){
			return false;
		}
	}
	atPos = email.indexOf("@",1)
	if (atPos == -1){
		return false;
	}
	if (email.indexOf("@",atPos+1) != -1){
		return false;
	}
	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1){
		return false;
	}
	if (periodPos+3 > email.length){
		return false;
	}
	return true;
}
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