Js_eval vs execScript

He guys,

I have a problem making any of the following running:

Browser.document.js_eval("alert('boo');");
Browser.document.js_eval("document.getElementById('ctl00_cntMainContent_Txt_Message_RTB').value='testing'");

I made the following script to write some string in tinymce editor

if $BrowserName == “FF” then
Browser.document.js_eval(“tinyMCE.execInstanceCommand(‘ctl00_cntMainContent_Txt_Message_RTB’,
‘mceSetContent’, false, ‘Test Mail’)”);
else
Browser.document.parentWindow.execScript(“tinyMCE.execInstanceCommand(‘ctl00_cntMainContent_Txt_Message_RTB’,
‘mceSetContent’, false, ‘Test Mail’)”)
end

The one for IE working great, but js_eval is not working, even if I use
simpler JS like alert(‘Hi’);

Any advice please?

Really appreciate your help.
Thanks!

Hey guys,

Please any idea, how to make js_eval works?
I need to show a confirm dialog as a start.
Then I need to execute JS in FF, any replacement for js_eval

Many thanks.