JS密码生成与强度检测完整实例(附demo源码下载)

function getPwd(n)
{
 var s = '';
 while(n--)
 s += String.fromCharCode(33 + Math.floor(Math.random()*(126-33)))
 document.getElementById('txt1').value = s;
}

function getTime()
{
 var str = '预计破解用时：';
 var selChar = document.getElementById('selChar');
 var txtPwdLen = document.getElementById('txtPwdLen');
 var num = Math.pow(parseInt(selChar.value), parseInt(txtPwdLen.value));
 str += formatTime(num / (1024*1024*1024*2.4*2));
 document.getElementById('span2').innerHTML = str;
}
function formatTime(s)
{
 var str = '';
 if(s<1)return '小于1秒！';
 s = Math.floor(s);
 if(s >= 1) str = s % 60 + '秒' + str;
 s = Math.floor(s / 60);
 if(s >= 1) str = s % 60 + '分' + str;
 s = Math.floor(s / 60);
 if(s >= 1) str = s % 24 + '时' + str;
 s = Math.floor(s / 24);
 if(s >= 1) str = s + '天' + str;
 return str;
}

function showPwd()
{
  var p = document.getElementById('txt2').value;
  if(p.length < 4)
  {
    showError('密码至少4位！');
    return;
  }
  var o = checkPwd(p);
  if(o.isSame)
  {
    showError('密码为重复字符！');
    return;
  }
  for(var i=0; i<arrPwd.length; i++)
  {
    if(arrPwd[i] == p || arrPwd[i].indexOf(p) == 0)
    {
      showError('密码为100大常用密码！');
      return;
    }
  }
  var year = parseInt(p.substr(0,4));
  if(!isNaN(year) && year>1900 && year<2100)
  {
    var month = parseInt(p.substr(4,2));
    if(!isNaN(month) && month>0 && month<13)
    {
      var day = parseInt(p.substr(6,2));
      if(!isNaN(day) && day>0 && day<32)
      {
        showError('不要使用日期作为密码！');
        return;
      }
    }
  }
  var hasUpper = false;
  var hasLow = false;
  var hasNum = false;
  var hasOther = false;
  for(var i=0; i<p.length; i++)
  {
    var c = p.charCodeAt(i);
    if(c>=65&&c<=90)hasUpper=true;
    else if(c>=97&&c<=122)hasLow=true;
    else if(c>=48&&c<=57)hasNum=true;
    else hasOther=true;
  }
  var pwdNum = 0;
  if(hasUpper)pwdNum+=26;
  if(hasLow)pwdNum+=26;
  if(hasNum)pwdNum+=10;
  if(hasOther)pwdNum+=32;
  var num = Math.pow(pwdNum, p.length);
  var str = '密码长度:' + p.length + ' 强度:' + pwdNum + ' 预计破解用时:' + formatTime(num / (1024*1024*1024*2.4*2));
  var span1 = document.getElementById('span1');
  span1.style.color = 'blue';
  span1.innerHTML = str;
}

var $lock = false;
function checkCapsLock(fn)
{
 document.documentElement.onkeypress = function(e)
 {
  var e = e || event;
  var k = e.keyCode || e.which;
  var s = e.shiftKey || (k == 16) || false;
  if(k>=65&&k<=90)$lock=!s;
  if(k>=97&&k<=122)$lock=s;
  fn($lock);
 }
 document.documentElement.onkeyup = function(e)
 {
  var e = e || event;
  var k = e.keyCode || e.which;
  if(k==20)$lock = !$lock;
  fn($lock);
 }
}