code: func (c *Page) AddScriptToEvaluateOnLoad(scriptSource string) (string, error) {
  	var v PageAddScriptToEvaluateOnLoadParams
  	v.ScriptSource = scriptSource
  	return c.AddScriptToEvaluateOnLoadWithParams(&v)
  }
docs: // AddScriptToEvaluateOnLoad - Deprecated, please use addScriptToEvaluateOnNewDocument instead.
  // scriptSource -
  // Returns -  identifier - Identifier of the added script.