Error with checkbox click event adding to Text Box NF2010

I am trying to make a checkbox click event that when the checkbox is clicked it will insert a text into the text box.  When I debug it doesn't show that anything is being recognized.  What am I doing wrong?  I've tried using jquery and jscript styles and both give me nothing.  I am new to Nintex so I bbelieve it has to do with the setting of jscript variables on the sharepoint item.

Textbox JScript Variable - TextFileRec
Checkbox JScript Variable - CBFileRec

Here is where I am currently
NWF$(document).ready(function(){
NWF$(CBFileRec).click(function(){
var text = TextFileRec;
var CB = CBFileRec;
if (CB == true)
{
text.value = "Insert Text"
}
});
});