Help with IF deluge

Help with IF deluge

In my application I have a radio button with 3 options "New", "Yes", "No".  I have a multi line field called "If no, Why"

I want the person editing to be forced to enter notes in the multi line box if they select "No" on the radio button.

HERE IS MY SCRIPT

if ((input.Hired  ==  "No")  &&  (input.If_No_Why  ==  null))
{
    alert "Please explain why this person was not hired";
    cancel submit;
}



If I take out the && (input.If_No_Why  ==  null)) I get the alert and cancel submit, when I add the &&... data is added successfully.

What am I doing wrong?

I used this page as reference: