Trigger a Function in Client-side Script in View Mode by Button Added Using User Event Script

By design client side scripts may be used in form in "edit" mode only. In case an action needs to be performed when viewing the record (e.g. by clicking a button) then the following setup and code will work.
In the following example simple alert() will represent client-side script.

First there is a client-side script "clientFunction.js" with the following function:

function clientFunction() {	alert('Client script triggered');	// other client-side code} 

This client-side script has to be uploaded into NetSuite account using following steps:

1. Customization > Scripting > Scripts > New: Client script
2. Name = Client Function
   ID = _client_function
   Script File = select "- New -" and upload the "clientFunction.js" file
   Save (no deployment is needed)

Then User Event script can contain code in beforeLoad function which adds a button and assign newly created script to run upon clicking:

function beforeLoadScript(type, form, request) {	form.setScript('customscript_client_function');	form.addButton('custpage_recalc', 'Button (Client)', 'clientFunction()' );}

This script should be uploaded into NetSuite and deployed on record where the button should be added and client-side script executed.

Expected result is a new button on a form in view mode, alert with "Client script triggered" message is shown by clicking it.

Also, for client scripts that needs to have parameter passed to it, use the example code below as reference.

Client Script:

function clientFunction(message) {	alert(message);	// other client-side code} 

User Event Script:

function beforeLoadScript(type, form, request) {	var message = 'Client script triggered';	form.setScript('customscript_client_function');	form.addButton('custpage_recalc', 'Button (Client)', 'clientFunction("'+ message +'")' );}

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