Hide/show fields based on a Boolean with JavaScript Dynamics CRM

Hi Stack community very new to Dynamics CRM development.

I want to achieve the following:

1. IF Validation Complete equals "Yes" THEN Show field Validated On && Set Validated On field value to UTC now current date, todays date. ELSE Hide field Validated On.

2. cr253_validationcomplete is a YES/NO field.

Please advise.

 function showValidationOnChange (executionContext) {
        //Initiated Form Context.
        var formContext = executionContext.getFormContext();
        
        var ValidationComplete = formContext.getAttribute("cr253_validationcomplete").getValue();
      
        if (ValidationComplete === true) {
            //Using SetVisible propertly for hiding field Account Address.
            formContext.getControl("cr253_validatedon").setVisible(true);
            formContext.getControl("cr253_validatedon").setValue(Date.now());
        }
    }

Your code just needs some improvements, in particular the setValue should be used with getAttribute and to get a new date in JavaScript is new Date(), also the else condition is missing, my script has not been tested.

function showValidationOnChange (executionContext) {
    //Initiated Form Context.
    var formContext = executionContext.getFormContext();
    
    var ValidationComplete = formContext.getAttribute("cr253_validationcomplete").getValue();
  
    if (ValidationComplete === true) {
        //Using SetVisible propertly for hiding field Account Address.
        formContext.getControl("cr253_validatedon").setVisible(true);
        formContext.getAttribute("cr253_validatedon").setValue(new Date());
    } else {
        formContext.getControl("cr253_validatedon").setVisible(false);
        formContext.getAttribute("cr253_validatedon").setValue(null);           
    }
}