eval-based Javascript test page

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html lang="en-us"><!--<![endif]--><head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <meta charset="utf-8">
  <head>
    <script type="text/javascript">//<![CDATA[
"use strict";
var x   = 0,
    $   = function(x){return document.getElementById(x);},
    bw  = function(id,val){
            var thid = id, thval= val;
            $(thid).value = thval;
            $(thid).style.display = $(thid).style.display = 'block';
          },
    go  = function(idin,idout){
            var res = eval($(idin).value);
            bw(idout, res);
          };

    //]]></script>
    <style type="text/css">
      h3            { margin-top:0; margin-bottom:0; margin-left:10; margin-right:10 }
      input         { font-family:"Segoe UI"; font-weight:bold; font-size:10 }
      textarea      { font-family:"Consolas"; font-weight:bold; width:80em; height:30em; color:#808010 }
      #inputtitle1  { display:block }
      #input1       { color:#408020 }
      #outputtitle1 { display:block }
      #output1      { color:#804020 }
      #button1      { margin-left:80; color:#408010 }
      #button2      { margin-left:20; color:#804010 }
    </style>
  </head>
  <body bgcolor="#F8F8F0">
      <h3 id="inputtitle1">Input</h3>
      <textarea id="input1" name="input1"></textarea>
      <br/>
        <input id="button1" type="submit" value="Eval Input"   onclick="go('input1','output1');return false;" />
        <input id="button2" type="submit" value="Clear Output" onclick="bw('output1','');return false;"       />
      <h3 id="outputtitle1">Output</h3>
      <textarea id="output1" name="output1"></textarea>
  </body>
</html>