<div align="center" border="1">
<img src="http://help-komputers.ru/img2/genpar2.gif" 
alt=" "><br><br>
<script language="JavaScript" type="text/javascript">
with (document) {
 writeln('  : <form name=pass_form>' +
 '<input name="upper" type="checkbox">  <br>' +
 '<input name="lower" type="checkbox">  <br>' +
 '<input name="digit" type="checkbox"> <br><br>  : ' +
 '<select name="numbers"><option value="4" selected>4</option>');
 for (j = 5; j <= 20; j++) { writeln('<option value=' + j + '>' + j + '</option>'); }
 writeln('</select><br><br><input type="button" value=" " onClick=generate()>' +
 '<br><br>: <input name="getback" size="32" type="text" value=""></form>');
}
upp = new Array('','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
low = new Array('','a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');
dig = new Array('','0','1','2','3','4','5','6','7','8','9');

function rnd(x,y,z) {
 var num;
 do {
	num = parseInt(Math.random()*z);
	if (num >= x && num <= y) break;
 } while (true);
return(num);
}

function gen_pass() {
var pswrd = '';
var znak, s;
var k = 0;
var n = document.pass_form.numbers.value;
var pass = new Array();
var w = rnd(35,85,105);
for (var r = 0; r < w; r++) {
	if (pass_form.upper.checked) { znak = rnd(1,26,100); pass[k] = upp[znak]; k++; }
	if (pass_form.lower.checked) { znak = rnd(1,26,100); pass[k] = low[znak]; k++; }
	if (pass_form.digit.checked) { znak = rnd(1,10,100); pass[k] = dig[znak]; k++; }
}
for (var i = 0; i < n; i++) {
	s = rnd(1,k-1,100);
	pswrd+= pass[s];
}
document.pass_form.getback.value = pswrd;
}

function generate() {
if (pass_form.upper.checked || pass_form.lower.checked || pass_form.digit.checked)
	{ gen_pass(); }
else { alert('  !'); pass_form.upper.checked = true; }
}
</script>		
</div>
