<input type="radio" name="r" value="r1" onclick="document.getElementById('t').value='r1';document.getElementById('x').value='r3';" />

keychar = String.fromCharCode(key);

if ((key==null) || (key==0) || (key==8) ||  (key==9) || (key==13) || (key==27) ) {

return true;

<input type="radio" name="r" value="r1" onclick="document.getElementById('t').value=r1;document.getElementById('x').value=r3;" />
  <input type="radio" name="r" value="r2" onclick="document.getElementById('t').value=r2;document.getElementById('x').value=r4;" />
  <input type="text" name="t" id="t" />


  <input type="text" name="x" id="x" />

<input type="radio" name="r" value="r1" onclick="document.getElementById('t').value=this.value;" />

<input type="radio" name="r" value="r2" onclick="document.getElementById('t').value=this.value;" />

<input type="text" name="t" id="t" />