password strength checker javascript
<script language="javascript"> function passwordChanged() { var strength = document.getElementById('strength'); var strongRegex = new RegExp("^(?=.{14,})(?=.*[A-Z])(?=.*[a-z])(?=.*[0-9])(?=.*\\W).*$", "g"); var mediumRegex = new RegExp("^(?=.{10,})(((?=.*[A-Z])(?=.*[a-z]))|((?=.*[A-Z])(?=.*[0-9]))|((?=.*[a-z])(?=.*[0-9]))).*$", "g"); var enoughRegex = new RegExp("(?=.{8,}).*", "g"); var pwd = document.getElementById("password"); if (pwd.value.length == 0) { strength.innerHTML = 'Type Password'; } else if (false == enoughRegex.test(pwd.value)) { strength.innerHTML = 'More Characters'; } else if (strongRegex.test(pwd.value)) { strength.innerHTML = '<span style="color:green">Strong!</span>'; } else if (mediumRegex.test(pwd.value)) { strength.innerHTML = '<span style="color:orange">Medium!</span>'; } else { strength.innerHTML = '<span style="color:red">Weak!</span>'; } } </script> <input name="password" id="password" type="text" size="15" maxlength="100" onkeyup="return passwordChanged();" /> <span id="strength">Type Password</span>
