function sendAjaxGet() {
    var uname = document.getElementById('uname').value;
    var email = document.getElementById('email').value;
    var fname = document.getElementById('fname').value;
    var lname = document.getElementById('lname').value;
    var password = document.getElementById("password").value;
    var confirm_password = document.getElementById("confirm_password").value;
    var splChars = "*|,\":<>[]{}`\';()@&$#%";



    if(fname.length>20 || fname.length<3){
        event.preventDefault();
        alert("Name must be 3-20 characters");
        document.getElementById("fname").focus();
        return false;
    }else{
        if (!(/^[a-zA-Z]+$/.test(fname))){
            event.preventDefault();
            alert("Name must contain only letters");
            document.getElementById("fname").focus();
            return false;
        }
    }

    if(password !== confirm_password) {
        event.preventDefault();
        alert("Passwords not match");
        document.getElementById("password").focus();
        return false;
    }

    if(lname.length>20 || lname.length<4){
        event.preventDefault();
        alert("Last Name must be 4-20 characters");
        document.getElementById("lname").focus();
        return false;
    }else{
        if (!(/^[a-zA-Z]+$/.test(lname))){
            event.preventDefault();
            alert("Last Name must contain only letters");
            document.getElementById("lname").focus();
            return false;
        }
    }

    if(password.length<6 || password.length>10){
        event.preventDefault();
        alert("Password must be 6-20 characters");
        document.getElementById("password").focus();
        return false;
    }/*else{
        for (var i = 0; i < password.length; i++) {
            if (splChars.indexOf(password.length.charAt(i)) === -1){
                event.preventDefault();
                alert("Password must contain at least one letters,one number and one symbol");
                document.getElementById("password").focus();
                return false;
            }
            if(!(/^[a-zA-Z]+$/.test(password))){
                event.preventDefault();
                alert("Password must contain at least one letters,one number and one symbol");
                document.getElementById("password").focus();
                return false;
            }
            if(!(/^[0-9]+$/.test(password))){
                event.preventDefault();
                alert("Password must contain at least one letters,one number and one symbol");
                document.getElementById("password").focus();
                return false;
            }
        }
    }*/

    sendAjaxPOST1();
    return true;
}

function countryList(){
         var country_list = ["Afghanistan","Albania","Algeria","Andorra","Angola","Anguilla","Antigua &amp; Barbuda","Argentina","Armenia","Aruba","Australia","Austria","Azerbaijan","Bahamas","Bahrain","Bangladesh","Barbados","Belarus","Belgium","Belize","Benin","Bermuda","Bhutan","Bolivia","Bosnia &amp; Herzegovina","Botswana","Brazil","British Virgin Islands","Brunei","Bulgaria","Burkina Faso","Burundi","Cambodia","Cameroon","Cape Verde","Cayman Islands","Chad","Chile","China","Colombia","Congo","Cook Islands","Costa Rica","Cote D Ivoire","Croatia","Cruise Ship","Cuba","Cyprus","Czech Republic","Denmark","Djibouti","Dominica","Dominican Republic","Ecuador","Egypt","El Salvador","Equatorial Guinea","Estonia","Ethiopia","Falkland Islands","Faroe Islands","Fiji","Finland","France","French Polynesia","French West Indies","Gabon","Gambia","Georgia","Germany","Ghana","Gibraltar","Greece","Greenland","Grenada","Guam","Guatemala","Guernsey","Guinea","Guinea Bissau","Guyana","Haiti","Honduras","Hong Kong","Hungary","Iceland","India","Indonesia","Iran","Iraq","Ireland","Isle of Man","Israel","Italy","Jamaica","Japan","Jersey","Jordan","Kazakhstan","Kenya","Kuwait","Kyrgyz Republic","Laos","Latvia","Lebanon","Lesotho","Liberia","Libya","Liechtenstein","Lithuania","Luxembourg","Macau","Macedonia","Madagascar","Malawi","Malaysia","Maldives","Mali","Malta","Mauritania","Mauritius","Mexico","Moldova","Monaco","Mongolia","Montenegro","Montserrat","Morocco","Mozambique","Namibia","Nepal","Netherlands","Netherlands Antilles","New Caledonia","New Zealand","Nicaragua","Niger","Nigeria","Norway","Oman","Pakistan","Palestine","Panama","Papua New Guinea","Paraguay","Peru","Philippines","Poland","Portugal","Puerto Rico","Qatar","Reunion","Romania","Russia","Rwanda","Saint Pierre &amp; Miquelon","Samoa","San Marino","Satellite","Saudi Arabia","Senegal","Serbia","Seychelles","Sierra Leone","Singapore","Slovakia","Slovenia","South Africa","South Korea","Spain","Sri Lanka","St Kitts &amp; Nevis","St Lucia","St Vincent","St. Lucia","Sudan","Suriname","Swaziland","Sweden","Switzerland","Syria","Taiwan","Tajikistan","Tanzania","Thailand","Timor L'Este","Togo","Tonga","Trinidad &amp; Tobago","Tunisia","Turkey","Turkmenistan","Turks &amp; Caicos","Uganda","Ukraine","United Arab Emirates","United Kingdom","Uruguay","Uzbekistan","Venezuela","Vietnam","Virgin Islands (US)","Yemen","Zambia","Zimbabwe"];
    var cntr = document.getElementById("country");
    for(var i=0; i<country_list.length; i++){
        var option = document.createElement("option");
        if(country_list[i] === "Greece"){
            option.value = country_list[i];
            option.text = country_list[i];
            option.selected = true;
            cntr.appendChild(option);
        }else{
            option.value = country_list[i];
            option.text = country_list[i];
            cntr.appendChild(option);
        }
    }

}


function Register(central){
    var changeDir = document.getElementsByClassName("mySignIn");
	while(changeDir.length > 0){
	changeDir[0].parentNode.removeChild(changeDir[0]);
        }
    var changeDir1 = document.getElementsByClassName("myForm");
	while(changeDir1.length > 0){
	changeDir1[0].parentNode.removeChild(changeDir1[0]);
    }
    var changeDir2 = document.getElementsByClassName("ajaxContent");
	while(changeDir2.length > 0){
	changeDir2[0].parentNode.removeChild(changeDir2[0]);
        }
    var div = document.createElement("div");
    div.className = "myForm";
    div.innerHTML = [
                    '<form onsubmit="sendAjaxGet();" method="post">\
                        <label for="uname">*Username: </label>\
                        <input  pattern=".{8,50}" id="uname" type="text" name=\'Username\' required title="Username must be at least 8 charachters">\
                        <div id="leftSpace"><label for="email">*email:</label>\
                        <input pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,13}$" id="email" type="email" name=\'email\' required></div><br><br>\
                        <label for="password">*Password:</label>\
                        <input  id="password" type="password" placeholder="Password" name=\'Password\' required title="Password must contain at least one charachter one number and one symbol">\
                        <div id="leftSpace"><label for="confirm_password">*Confirm Password:</label>\
                        <input id="confirm_password" type="password" placeholder="Confirm Password" name=\'Confirm Password\' required></div><br><br>\
                        <label for="fname">*First Name:</label>\
                        <input id="fname" type="text" name=\'First Name\' required>\
                        <div id="leftSpace"><label for="lname">*Last Name:</label>\
                        <input  id="lname" type="text" name=\'Last Name\' required></div><br><br>\
                        <label for="bdate">*Birth Date:</label>\
                        <input id=\'bdate\' type="date" name="bdate" max="2001-12-31">\
                        <div id="leftSpace"><label for="gender">Gender:</label>\
                        <input id="Male" type="radio" name="gender" value="male">Male\
                        <input id="Female" type="radio" name="gender" value="female">Female</div><br><br>\
                        <label for="country">*Country:</label>\
                        <select id="country">\
                        </select>\
                        <div id="leftSpace"><label for="city">*City:</label>\
                        <input pattern=".{2,50}" id="city" type="text" name=\'City\' required></div><br><br>\
                        <div id="centerIt"><label>More Info:</label><br>\
                        <textarea maxlength="500" id="info" rows="6" cols="50" placeholder="Your text here" ></textarea></div><br><br>\
                        <input id="submit" type=\'submit\' value=\'Create Account\'" ><br>\
                    </form>'
    ].join('');
    document.getElementById(central).insertBefore(div,null);
    countryList();
}

function SignIn(central){
    var changeDir = document.getElementsByClassName("myForm");
	while(changeDir.length > 0){
	changeDir[0].parentNode.removeChild(changeDir[0]);
        }
        var changeDir1 = document.getElementsByClassName("mySignIn");
	while(changeDir1.length > 0){
	changeDir1[0].parentNode.removeChild(changeDir1[0]);
        }
        var changeDir2 = document.getElementsByClassName("ajaxContent");
	while(changeDir2.length > 0){
	changeDir2[0].parentNode.removeChild(changeDir2[0]);
        }
    var div = document.createElement("div");
    div.className = "mySignIn";
    div.innerHTML = [
        '<form onsubmit="sendAjaxGet();" method="post">\
            <label for="uname">Username: </label>\
            <input  pattern=".{8,50}" id="uname" type="text" name=\'Username\' required >\
            <label for="password">Password:</label>\
            <input  id="password" type="password" placeholder="Password" name=\'Password\' required >\
            <input id="signIn" type=\'submit\' value=\'Sign In\'  onclick="sendAjaxPOST2();" ><br>\
            <h2>Don\'t wanna miss a thing..?</h2>\
        </form>'
    ].join('');
    document.getElementById(central).insertBefore(div,null);
}

function sendAjaxPOST1(){
    event.preventDefault();
    var uname = document.getElementById('uname').value;
    var email = document.getElementById('email').value;
    var fname = document.getElementById('fname').value;
    var lname = document.getElementById('lname').value;
    var bdate = document.getElementById('bdate').value;
    var info = document.getElementById('info').value;
    var password = document.getElementById('password').value;
    //var Country = document.getElementById('Country').value;
    var city = document.getElementById('city').value;

    var xhr = new XMLHttpRequest();
    xhr.open('POST','Register');
    xhr.onload = function () {
        if (xhr.readyState === 4 && xhr.status === 200) {
            var changeDir = document.getElementsByClassName("myForm");
            while(changeDir.length > 0){
            changeDir[0].parentNode.removeChild(changeDir[0]);
            }
            document.getElementByClassName('ajaxContent')
            .innerHTML = xhr.responseText;
        } else if (xhr.status !== 200) {
            alert('Request failed. Returned status of ' + xhr.status);
        }
    };
    // set the content type
    xhr.setRequestHeader('Content-type',
    'application/x-www-form-urlencoded');
    xhr.send("fname=" + fname + "&lname=" + lname + "&email=" + email + "&uname=" + uname + "&bdate=" + bdate + "&info=" + info + "&password=" + password + "&city=" + city);
}