function prepare(encrypt,op_salt,op_salt_id) {
	var salt = document.getElementById(op_salt).value;
	var salt_id = document.getElementById(op_salt_id).value;
	var secure = document.getElementById(encrypt).value;
	document.getElementById(op_salt).value = salt_id+":"+hex_md5(salt+hex_md5(secure));
	document.getElementById(encrypt).value = '';
	return true;
}