JScript Web Resources

JScript Web Resources are probably the most important type of web resources that you will be using with Microsoft Dynamics CRM.

Applications of JavaScript in CRM

Form Event Programming

Form Event Programming is used to handle client-side behaviors such as what happens when a user opens a form, changes some data, moves through tabs, etc. To achieve such client-side interactions you will be writing JavaScript code and adding it as a JScript Web Resource in CRM. However, the JavaScript code which you will write has to use Dynamic CRM’s Xrm.Page model and not the standard JavaScript DOM. Using Xrm.Page model is Microsoft’s way of coding which ensures that any code you write using this model will be compatible with any future versions of CRM.

Web Resources

In addition to being used in Form Event Programming, JavaScript is used in other applications of CRM such as −

  • Open Forms, Views and Dialogs with a unique URL.

  • Using OData and SOAP endpoints to interact with web services.

  • Referencing JavaScript code inside other Web Resources (such as HTML web resources).

In such cases, you would write your JavaScript code (using Xrm.Page model) and add it as a JScript Web Resource in CRM, which can then be referenced anywhere with a unique URI.

Ribbon Customizations

Finally, one of the other common use of JavaScript is to handle ribbon customizations such as −

  • Display/Hide ribbon buttons based on some logic
  • Enable/Disable ribbon buttons based on some logic
  • Handle what happens when you click a certain ribbon button

To handle such scenarios, you will write your JavaScript logic (using Xrm.Page model) and then add it as a JScript Web Resource. This Web Resource can then be referenced in the ribbon button’s XML and we can specify which method in which JScript file to call to check if a ribbon button should be displayed/hidden or enabled/disabled or handle click events.

Xrm.Page Object Model

Following is the Xrm.Page object’s hierarchy showing the available namespaces, objects, and their collections. You will be using these properties while writing JScript code.

XRM Page Object Model


Sr.No Object & Description


Provides methods to retrieve context-specific information such as organization details, logged-in user details, or parameters that were passed to the form in a query string.



Provides access to the entity data and methods to manage the data in the form as well as in the business process flow control.



Contains methods to retrieve information about the user interface, in addition to collections for several sub-components of the form.


Sr.No Object & Description


Provides method to −

  • Retrieve record information
  • Save method
  • Collection attributes


Methods to retrieve properties of business process flow.



Provides access to navigation items using items collection.



Uses Items collection to access available forms to the user. Also uses the navigation method to close and open forms.



Each process has a collection of stages that can be accessed using getStages method of process.



Each stage comprises of various steps that can be accessed using getSteps method of stage.


Sr.No Collections & Description


Provides access to entity attributes available on the form.



ui.controls − Provides access to each control present on the form.

attribute.controls − Provides access to all the controls within an attribute.

section.controls − Provides access to all the controls within a section.



Provides access to all the navigation items on a form.



Provides access to all the tabs on a form.



Provides access to all the sections on a form.

Supported Events in Form Programming

The Form Programming using Xrm.Page model allows you to handle the following form events −

  • onLoad
  • onSave
  • onChange
  • TabStateChange
  • OnReadyStateComplete
  • PreSearch
  • Business Process Flow control events

Form Programming Example

In this example, we will put some validations on the Contact form based on the PreferredMethodofCommunication that the user selects. Hence, if the user selects his/her preferred method as Email, then the Email field should become mandatory and similarly for other fields of Phone and Fax.

Step 1 − Create a JavaScript file named contacts.js and copy the following code.

function validatePreferredMethodOfCommunication() { 

   //get the value of Preffered Method of Communication code 
   var prefferedContactMethodCode = 
      Xrm.Page.getAttribute('preferredcontactmetho dcode').getValue();  
   //if Preferred Method = Any, make all fields as non-mandatory 
   //else if Preferred Method = Phone, make Mobile Phone field mandatory 
   //and all other fields as non-mandatory 
   //else if Preferred Method = Fax, make Fax field mandatory 
   //and all other fields as non-mandatory 
   if(prefferedContactMethodCode == 1) { 
   if(prefferedContactMethodCode == 2) { 
   } else if(prefferedContactMethodCode == 3) { 
   } else if(prefferedContactMethodCode == 4) { 
function clearAllMandatoryFields() { 
   //clear all mandatory fields 

Step 2 − Open the Contact entity form by navigating to Settings → Customizations → Customize the System → Contact entity → Forms → Main Form.

Step 3 − Click Form Properties.

Form Programming Form Properties

Step 4 − From the Form Properties window, click Add.

Form Programming Add Form Library

Step 5 − In the next Look Up Web Resource Record window, click New since we are creating a new web resource.

Form Programming Add Form Library New

Step 6 − In the New Web Resource window, enter the following details −

Name − new_contacts.js

Display Name − contacts.js

Type − JScript

Upload File − Upload the JavaScript file that you created from your local machine.

Form Programming Web Resource New

Step 7 − Click Save followed by Publish. After this close the window and you will be back to Look Up Web Resource Record window.

Step 8 − Here, you can now see the new_contacts.js web resource. Select it and click Add. You have now successfully added a new web resource and registered it on the form.

Form Programming Web Resource Add

Step 9 − Now we will add an event handler on the change of Preferred Method of Communication field. This event handler will call the JavaScript function that we just wrote. Select the following options from the Event Handler section.

Control − Preferred Method of Communication

Event − OnChange

Then, click the Add button, as shown in the following screenshot.

Form Programming Added New Form Library

Step 10 − In the next window of Handler Properties, we will specify the method to be called when the change event occurs.

Select Library as new_contacts.js and Function as validatePreferredMethodOfCommunication. Click OK.

Form Programming Add Handler

Step 11 − You will now be able to see the Form Library (Web Resource) and events registered on it. Click OK.

Form Programming Added Library Handler

Step 12 − Click Save followed by Publish.

Form Programming Publish Customizations

Step 13 − Now open any Contact form and set the Preferred Method of Communication as Phone. This will make the Mobile Phone field as mandatory. If you now try to save this contact without entering any mobile number, it will give you an error saying ‘You must provide a value for Mobile Phone’.

Form Programming Validation


In this chapter, we started by understanding the three important applications of JavaScript in CRM. Later, we explored the Xrm.Page model and used it to learn Form programming along with an example.