function buyRingtone(cdcode, modelId, operatorId) {

	document.ringtones.cdcode.value = cdcode;
	document.ringtones.modelId.value = modelId;
	document.ringtones.operatorId.value = operatorId;

	//Submit
	document.ringtones.submit();
}



function checkForm() {
	var error_str = "";

	if ((document.phone_num.area.value == "" || document.phone_num.area.value.length < 3) || (document.phone_num.phone1.value == "" || document.phone_num.phone1.value.length <3)|| (document.phone_num.phone2.value == "" || document.phone_num.phone2.value.length < 4)) {
		error_str = error_str + "You must enter a valid phone number.";
	}

	if (error_str != "") {
		alert(error_str);
		return false;
	} else {
		return true;
	}
}