title: calling a function from another function by 'onclick' event
body: <p>What I am trying to do is, call a function from another function by clicking a radio button in that function. Here is the code I have worked on so far-</p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
  rad1 = document.createElement("input");
  rad1.type = "radio";
  rad1.name = "dooropt";
  rad1.id = "rb1";
  rad1.value = "y";
  newP.appendChild(rad1);
  text1 = document.createTextNode("Yes ");
  newP.appendChild(text1);
  rad2 = document.createElement("input");
  rad2.type = "radio";
  rad2.name = "dooropt";
  rad2.id = "rb2";
  rad2.value = "n";
  newP.appendChild(rad2);
  text2 = document.createTextNode("No ");
  newP.appendChild(text2);
  button1 = document.createElement("input");
  button1.type = "button";
  button1.value = "Open main door";
  button1.style.visibility = "hidden";
  newP.appendChild(button1);
  button2 = document.createElement("input");
  button2.type = "button";
  button2.value = "Open apartment door";
  button2.style.visibility = "hidden";
  newP.appendChild(button2);
  area.appendChild(newP);
  rad1.onclick = mainalso();
  rad2.onclick = onlyapp();
  }
  
   function mainalso()
  { 
      button1.style.visibility="visible";
      button2.style.visibility="visible";
      }
  
   function onlyapp()
  {
      button2.style.visibility="visible";
      button1.style.visibility="hidden";
      }
  &lt;/script&gt;
  </code></pre>
  
  <p>Now, whenever rad1 is clicked, i want mainalso() to run, as might be clear from the code. Since I am fairly new to JavaScript, I don't know where i'm making the mistake, in syntax or conceptually. Also, the first function (before mainalso()) is add(), and in it I repeatedly append same content on clicking a button in my body. I hope it is clear what I want to do. When rad1 is clicked, i want both buttons (button1 and button2) to appear, but on clicking rad2 I want only one button to appear. Both have been set to 'hidden' visibility at first.
  Please help me out. Sorry if it seems unclear, I tried my best..
  Thank you.</p>