A field is disabled when value changes to above 1000

<?php
    // Get an instance of the Xcrud class
    $xcrud = Xcrud::get_instance();	

    // Set the table to work with
    $xcrud->table("orderdetails");

    // Define which columns to display in the table
    // These columns will be shown in the table view
    $xcrud->columns("orderNumber,productCode,orderLineNumber,quantityOrdered,priceEach,total");

    // Define which fields are available for data entry or editing
    // These fields will be shown in the form view for adding/editing records
    $xcrud->fields("orderNumber,productCode,orderLineNumber,quantityOrdered,priceEach,total");

    // Set up a relation between the 'officeCode' field in the 'orderdetails' table
    // and the 'officeCode' and 'city' fields in the 'offices' table
    $xcrud->relation("officeCode", "offices", "officeCode", "city");

    // Set up a dynamic formula for the 'total' field
    // When the 'onmouseout' event is triggered on the 'quantityOrdered' or 'priceEach' fields,
    // the 'total' field will be calculated as quantityOrdered * priceEach and rounded to one decimal place
    $xcrud->set_formular(
        "total",
        'parseFloat({quantityOrdered}*{priceEach}).toFixed(1)',
        "onmouseout",
        "quantityOrdered,priceEach"
    );

    //When total is above 1000 the field totoal become disabled
    $xcrud->disable_logic("total","total",">","1000");


    // Render the Xcrud instance to display the table and form
    // This will output the HTML needed to display the table and form on the web page
    echo $xcrud->render();	
?>

SELECT `orderdetails`.`orderNumber` AS `orderdetails.orderNumber` 
,`orderdetails`.`productCode` AS `orderdetails.productCode` 
,`orderdetails`.`orderLineNumber` AS `orderdetails.orderLineNumber` 
,`orderdetails`.`quantityOrdered` AS `orderdetails.quantityOrdered` 
,`orderdetails`.`priceEach` AS `orderdetails.priceEach` 
,`orderdetails`.`total` AS `orderdetails.total` 
,`orderdetails`.`id` AS `primary_key` 
 
 FROM `orderdetails`
 
 
 
 LIMIT 0,10