js检测前台输入代码 jquery

//注册
function user_register(){
var txt_account = $("#txt_account").val();
var pwd_password = $("#pwd_password").val();
var pwd_password2 = $("#pwd_password2").val();
var txt_email = $("#txt_email").val();

if(pwd_password != pwd_password2){
alert("两次密码不相同");
$("#secode_img").attr("src",secode_show.php?sid='+Math.random());
return false;
}

var is_txt_account = /^[a-zA-Z_\u4E00-\u9FA5][a-zA-Z_0-9\u4E00-\u9FA5]{2,16}$/i;
if(!is_txt_account.test(txt_account)){
alert("用户名格式不正确");
location.reload();
return false;
}

var is_pwd_password = /^\w{6,20}$/i;;
if(!is_pwd_password.test()){
alert("密码输入有误");
location.reload();
return false;
}

var is_txt_email =  /^\w+([-\.]\w+)*@\w+([\.-]\w+)*\.\w{2,4}$/;
if(!is_txt_email.test(txt_email)){

alert("邮箱格式不正确");
location.reload();
return false;
}
return true;
}