Properties of the DataWindow class allow you to handle client-side events in JavaScript code. The JavaScriptFile property specifies the JS file that contains JavaScript functions for handling individual client-side events. Make sure to deploy the JavaScript file that contains your customized event handling code. You assign the JavaScriptFile property in an #IF DEFINED -#END IF code block:
#IF Defined PBWEBFORM THEN
dw_1.JavaScriptFile = “D:\Scripts\MyScriptFile.js”
#end if