function checkUsername() { var elMsg = document.getElementById'feedback'); var elUsername = document.getElementById('username'); if (elUsername.value.length < 5) { elMsg.textContent = 'Username must be 5 characters or more'; } else { elMsg.textContent = ''; } } function checkUsername() {\ var elMsg = document.getElementById('feedback'); if (this.value.length<5) { elMsg.textContent = 'Username must be 5 characters or more';nm } else { elMsg.textContent = ''; } } var elUsername = document. getElementById('username'); elUsername.onblur = checkUsername; va2 function checkUsername() { var elMsg = document.getElementById('feedback'); if (this.value.length<5) { elMsg.textContent = 'Username must be 5 characters or more' ; } else { elMsg.textContent = ''; } } var elUsername = document.getElementById('feedback'); if (this.value.length < 5) { el.Msg.textContent = ''; } } el.addEventListener('blur'.function() { el.addEventListener('blur', function() { checkUsername(5); }, false); } else { el.attachEvent('onblur', function() { checkUsername(5); }); }