cracker calculator

crackcalc.html

<script>

function doit()
{
  var n = parseInt(document.all.item("len").value);
  if(n<1 || n>20)
  {
    alert("Invalid value for password length. Valid range is 1..20");
    return;
  }
  var speedS = document.all.item("speed").value;
  speedS = speedS.replace(",", "");
  var speed = parseFloat(speedS);
  if(speed<=0 || speed>100000000)
  {
    alert("Invalid value for speed");
    return;
  }
  
  var pcn = parseInt(document.all.item("pcn").value);
  if(pcn<1 || pcn>1000000)
  {
    alert("Invalid value for the number of computers");
    return;
  }
  
  var cslen=0;
if(document.all.item("cslwr").checked)
	cslen += 26;
if(document.all.item("csuppr").checked)
	cslen += 26;
if(document.all.item("csdigits").checked)
	cslen += 10;
if(document.all.item("cssymb").checked)
	cslen += 12;
if(document.all.item("csascii").checked)
	cslen = 96;

  var t = Math.pow(cslen,n) / (speed*pcn);
  var s;
  
	if (t<60)
	 s=" a minute";
	else
	{
		t /= 60;
		if (t<180)
			s = Math.ceil(t).toString() + " minutes";
		else
		{	
			t /= 60;
			if (t<72)
				s = Math.ceil(t).toString() + " hours";
			else
			{	t /= 24;
			if (t<90)
				s = Math.ceil(t).toString() + " days";

				else
				{	t /= 30;
			if (t<36)
				s = Math.ceil(t).toString() + " months";
			else
			{	t /= 12;
				s = Math.ceil(t).toString() + " years";
			}
				}
				
			}
		}
	}
 
  
  document.all.item("result2").innerHTML = s;
}

</script>

<form method="POST">
  <table width="500" border="0" align="center" cellpadding="3" cellspacing="0">
    <tr bgcolor="#FFFFCC"> 
      <td align="right">Password length:</td>
      <td> 
        <input type="text" id="len" size="6" value="5"></td>
    </tr>
    <tr bgcolor="#FFFFCC"> 
      <td align="right">Speed:</td>
      <td> 
        <input type="text" id="speed" size="11" value="224000" name="T1"> passwords per second</td>
    </tr>
    <tr bgcolor="#FFFFCC"> 
      <td height="25" align="right">Number of computers: </td>
      <td> 
        <input type="text" id="pcn" size="6" value="1" name="T2"></td>
    </tr>
    <tr align="center" bgcolor="#FFFFCC"> 
      <td height="12" colspan="2"> 
        <table width="400" border="0" cellspacing="0" cellpadding="3">
          <tr> 
            <td width="25"> <input type="checkbox" name="cslwr" value="ON" checked></td>
            <td>chars in lower case&nbsp;</td>
            <td width="25"> <input type="checkbox" name="cssymb" value="ON"></td>
            <td>common punctuation&nbsp;</td>
          </tr>
          <tr> 
            <td width="25"> <input type="checkbox" name="csuppr" value="ON"></td>
            <td>chars in upper case</td>
            <td width="25"> <input type="checkbox" name="csascii" value="ON"></td>
            <td>full ASCII</td>
          </tr>
          <tr> 
            <td width="25" height="25"> 
              <input type="checkbox" name="csdigits" value="ON"></td>
            <td colspan="3">digits&nbsp;</td>
          </tr>
        </table></td>
    </tr>
    <tr align="center" bgcolor="#FFFFCC"> 
      <td height="5" colspan="2"> 
        <input type="button" value="Calculate!" onclick=doit();></td>
    </tr>
    <tr align="center" bgcolor="#FFFF99"> 
      <td height="6" colspan="2">Brute Force Attack 
        will take up to <strong><span id="result2"></span></strong></td>
    </tr>
  </table>