var checkRegisterForm = function () { // TODO: var userReg = /^[\w]{3,10}$/; var user = document.getElementById('username').value; var pwd = document.getElementById('password').value; var pwd2 = document.getElementById('password-2').value; if(userReg.test(user)===false){alert('非法用户名，请重新输入！');return false;} else if(pwd.length<6||pwd.length>20){alert('密码长度过短或过长，请重新输入！');return false;} else if(pwd!==pwd2){alert('两次输入的密码不一样，请重新输入！');return false;} //else{return ture;} return true; }