html form input radio,javascript - HTML Form Input with Radio and Text - Selection - Stack Overflow

I have a text input area attached to a radio button in an HTML form as shown here:

Standard 6'2"

Other

If the user selects the second radio option for "Other," I would like the text box to automatically be in focus for them to enter a value. Also, if the user clicks on the text box to enter a value, I would like the radio button for this to automatically be selected for them.

I've tried using onBlur or onChange or onKeyup on the form element, but can't seem to get it working.