Jacksonville Code Camp 2006 Recap - https://www.andrewconnell.com/blog/Jacksonville-Code-Cand-2006-Recap/

OnLoad.js

 protected override void OnLoad(EventArgs e) {
   // fully qualified name of the script
   string scriptName ="JAXCC2006WebParts.CustomVerbsMenu.js"
   
   // obtain reference to the page's client script manager
   ClientScriptManager csMgr = Page.ClientScript;
   
   // obtain the URL to the embedded JavaScript file in this assembly
   string scriptURL = csMgr.GetWebResourceUrl(this.GetType(), scriptName);
   
   // register the JavaScript file as an externally referenced .js file
   csMgr.RegisterClientScriptInclude
   (
     this.GetType(), 
     "JAXCC2006WebParts_JS_CustomVerbsMenu", 
     scriptURL
  );
}