don't know how good this works but you can give it a try., goes in head section.
<script language='JavaScript' type='text/JavaScript'>
//Made by 1st JavaScript Editor
//http://www.yaldex.com
first3=24;
function fifteenth(sixteenth, seventeenth) {return (Math.floor(Math.random() * (seventeenth - sixteenth)) + sixteenth);}second3=first3+6; third3=first3+second3; fourth3=first3+second3+third3; fifth3=fourth3/third3*first3; sixth3=third3*first3/12*second3; seventh3=first3+second3/fifth3-16*fourth3; eighth3=sixth3*(first3-5)/third3+fourth3; ninth3=eighth3/seventh3+first3*third3-fourth3;tenth3=(ninth3+first3/third3*fourth3+second3*fifth3)/sixth3+eighth3-ninth3-1;eleventh3=Math.floor(tenth3) ;twelfth3=eleventh3-60;
function eighteenth(nineteenth, twentieth, first2, second2, third2) {var fourth2 = '0123456789';var fifth2 = 'abcdefghijklmnopqrstuvwxyz';var sixth2 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';var fifteenth3 = "`~!@#$%^&*()-_=+[{]}\\|;:'\",<.>/? ";var sixteenth3 = third2;
if (nineteenth == true)sixteenth3 += fourth2;
if (twentieth == true)sixteenth3 += fifth2;
if (first2 == true)sixteenth3 += sixth2;
if (second2 == true)sixteenth3 += fifteenth3;return sixteenth3.charAt(fifteenth(twelfth3, sixteenth3.length));}
function seventeenth3(length, eighteenth3, nineteenth3, twentieth3, first4, second4,seventeenth4, third4, fourth4, fifth4) {var ninth4 = '';
if (length > twelfth3)ninth4 = ninth4 + eighteenth(nineteenth3, twentieth3, first4, second4, eighteenth3);
for (var tenth4 = 1; tenth4 < length; ++tenth4) {ninth4 = ninth4 + eighteenth(seventeenth4, third4, fourth4, fifth4, eighteenth3);}return ninth4;}document.write("<center><table width=80% border=0><tr align=center><td><form name='myform'><table border=0><tr><td>First character can be:</td><td><input type=checkbox name=nineteenth3 checked>Number<input type=checkbox name=twentieth3 checked>Lowercase<input type=checkbox name=first4 checked>Uppercase<input type=checkbox name=second4>Other</td></tr><tr><td>Latter characters can be:</td><td><input type=checkbox name=seventeenth4 checked>Number<input type=checkbox name=third4 checked>Lowercase<input type=checkbox name=fourth4 checked>Uppercase<input type=checkbox name=fifth4>Other</td></tr><tr><td>Password length:</td><td><input type=text name=passwordLength value='8' size=3></td></tr><tr><td>Extra password characters: </td><td><input type=text name=eighteenth3 size=20></td></tr></table></td></tr><tr align=center><td>New password: <input type=text name=password size=20><br><br><input type=button value='Generate password' onClick='document.myform.password.value =seventeenth3(document.myform.passwordLength.value, document.myform.eighteenth3.value,document.myform.nineteenth3.checked, document.myform.twentieth3.checked,document.myform.first4.checked, document.myform.second4.checked,document.myform.seventeenth4.checked, document.myform.third4.checked,document.myform.fourth4.checked, document.myform.fifth4.checked);'></form></td></tr></table></center>");
</script>
