我想知道我的验证脚本是否足够安全以防止用户错误或攻击

Question

我将此作为我的注册验证码。我想遵循我在服务器端用于我的javascript的模式。我想知道的是我的脚本是否足以应对任何用户错误或攻击。谢谢

function regvalidate() {
    var gender = $j("#gen").val();
    var surname = $j("#nsn").val();
    var firstname = $j("#nfn").val();
    var othername = $j("#notn").val();
    var username = $j("#un").val();
    var phone = $j("#tel").val();
    var password = $j("#pw").val();
    var rpassword = $j("#rpw").val();
    var sorigin = $j("#sor").val();
    var age = $j("#age").val();
    var churchname = $j("#cname").val();
    var churchname2 = churchname.replace(/[`~!@#$%^&*()_| \-=?;:'",.<>\{\}\[\]\\\/ ]/gi,'');
    var schoolname = $j("#sn").val();
    var schoolname2 = schoolname.replace(/[`~!@#$%^&*()_| \-=?;:'",.<>\{\}\[\]\\\/ ]/gi,'');
    var secquestion = $j("#sq").val();
    var secanswer = $j("#sqa").val();
    var secanswer2 = secanswer.replace(/\s/g,"");
    var originalcaptcha = $j("#ocaptcha").text();
    var usercaptcha = $j("#ucaptcha").val();    
    var chkb = $j("#chkb").prop("checked");

    if (gender!='female' && gender!='male') {
        alert("please select a valid gender");
    } else if (!surname.match(/^[a-zA-Z]{2,50}$/)) {
        alert("please enter a valid surname. Alphabets only and no space.");
    } else if (!firstname.match(/^[a-zA-Z]{2,50}$/)) {
        alert("please enter a valid firstname. Alphabets only and no space.");
    } else if (!othername.match(/^[a-zA-Z]{2,50}$/)) {
        alert("please enter a valid other name. Alphabets only and no space.");
    } else if (!username.match(/^[a-zA-Z0-9]{4,20}$/)) {
        alert("enter a valid username please. Alphanumeric supported only. Min: 4 Max: 20");
    } else if (!password.match(/^[a-zA-Z0-9]{5,20}$/)) {
        alert("password should only contain alphabets or numbers. Min: 5 Max: 20");
    } else if (pw!=rpassword) {
        alert("password is not the same");
    } else if (!phone.match(/^[0-9]{11,13}$/)) {
        alert("please enter a valid phone number");
    } else if (!sorigin.match(/^[a-zA-Z.]{3,15}$/)||sorigin.length<3) {
        alert("select your state");
    } else if (!age.match(/^[0-9]{2}$/)) {
        alert("input your correct age. Atleast Ten years of age");
    } else if (!churchname.match(/^[a-zA-Z0-9',.\-_\(\) ]{13,100}$/)) {
        alert("enter a valid church name. Do not abbreviate!");
    } else if (churchname.match(/(.)\1{3,}/)) {
        alert("enter a valid church name");
    } else if (churchname2.length<13) {
        alert("church name too short");
    } else if (!schoolname.match(/^[a-zA-Z0-9',.\-_\(\) ]{13,100}$/)) {
        alert("enter a valid school name. Do not abbreviate!");
    } else if (schoolname2.length<13) {
        alert("school name too short");
    } else if (schoolname.match(/(.)\1{3,}/)) {
        alert("enter a valid school name");
    } else {
        $j("#reghloading").show();
        $j.post("processorthis.php",$j("#regform").serialize(),function(data) {
            $j(".regresult").html(data);
        }).done(function() {
            $j("#reghloading").hide();
        }).fail(function() {
            alert("unable to process your request now. Check back later");
        });
    }; 
return false;
}