Example 5

<HEAD>
<TITLE>Example 5</TITLE>
<SCRIPT LANGUAGE="JavaScript">
<!--
var n,t;
function question(){
  n=prompt("number?","");
  if(n==null)
    return;
  n=parseFloat(n);
  t=setTimeout("clearTimeout(t);dispbin(0)",200);
  return;
}
function dispbin(x){
  var i;
  for(i=0;i<4;i++){
    if(x%Math.pow(2,4-i)>=Math.pow(2,3-i))
      document.forms[0].elements[i].checked=true;
    else
      document.forms[0].elements[i].checked=false;
  }
  x++;
  if(x<=n)
    t=setTimeout("clearTimeout(t);dispbin("+x+")",200);
  else
    question();
  return;
}
//-->
</SCRIPT>
</HEAD>
<BODY onLoad="question()">
<H1>Example 5</H1>
<FORM>
<INPUT TYPE=CHECKBOX>
<INPUT TYPE=CHECKBOX>
<INPUT TYPE=CHECKBOX>
<INPUT TYPE=CHECKBOX>
</FORM>
</BODY>