Iexplorer. ExecuteJS Error ??

Hello teacher, plugin generator where am I making a mistake in this code

https://hizliresim.com/kQhKlX

FalconWebBrowser.ExecuteJS("Plugin1","");

I want these sample codes to work
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IExplorer.ExecuteJS("Plugin1", "window.scrollTo(0,document.body.scrollHeight) ;");
result = IExplorer.ExecuteJS("Plugin1", "value = document.getElementById(id).href; ");
IExplorer.ExecuteJS("Plugin1", "document.getElementById('113800032074542').se lect edIndex = 6");
IExplorer.ExecuteJS("Plugin1", "document.getElementsByTagName('örnek').onclic k");
IExplorer.ExecuteJS("Plugin1", "document.getElementsByName('örnek')[0].click();");
IExplorer.ExecuteJS("Plugin1", "javascript:void(document.getElementById("emai l" ).value=""..mail.."");");


can you help me, thanks in advance