How do I validate a textarea to accept values so that it only accepts terms that begin with a capital letter and are seperated by commas?

JavaScript
//Tutor Form validation
function validateForm2()
{
//Variable declarations for form inputs
var f=document.forms["TutorForm"]["fname"].value;
var s=document.forms["TutorForm"]["sname"].value;
var u=document.forms["TutorForm"]["uname"].value;
var e=document.forms["TutorForm"]["email"].value;
var a=document.forms["TutorForm"]["address"].value;
var p=document.forms["TutorForm"]["pass"].value;
var p2=document.forms["TutorForm"]["pass2"].value;
var sub=document.forms["TutorForm"]["subjects"].value;
var i=document.forms["TutorForm"]["info"].value;
 
var atsymb=e.indexOf("@");
var dotsymb=e.lastIndexOf(".");
var commasymb=e.indexOf(",");
 
if (f==null || f=="")
{
document.getElementById("valAlert2").innerHTML="You forgot to tell us your first name.";
return false;
} 
else if (s==null || s==""){
document.getElementById("valAlert2").innerHTML="Please tell us your surname.";
return false;
} 
else if (u==null || u==""){
document.getElementById("valAlert2").innerHTML="Here at MyTutor.ie a username is neccessary.";
return false;
} 
else if (e==null || e=="" || atsymb<1 || dotsymb<atsymb+2>=e.length){
document.getElementById("valAlert2").innerHTML="We require an email address in order to create your profile.";
return false;
} 
else if (a==null || a=="" || a.length < 6){
document.getElementById("valAlert2").innerHTML="Your address is required.";
return false;
}
else if (p.length < 6 || p==null || p==""){
document.getElementById("valAlert2").innerHTML="Password must be greater then 6 characters in order to to keep your information safe.";
return false;
} 
else if (p2.length < 6 || p2==null || p2==""){
document.getElementById("valAlert2").innerHTML="You must enter more then six characters.";
return false;
} 
else if (p != p2){
document.getElementById("valAlert2").innerHTML="Please make sure you re-entered your password correctly.";
return false;
}
else if (sub==null || sub=="" ||  || commasymb<atsymb+2>=e.length){
document.getElementById("valAlert2").innerHTML="We require an email address in order to create your profile.";
return false;
}
else if (i==null || i=="" ||i <30){
document.getElementById("valAlert2").innerHTML="You should tell us more in order to maximise your MyTutor.ie experience.";
return false;
} else{
alert(
f + " Welcome to MyTutor.ie");
}
 }

<!--Tutor Form-->
        <div class="col-md-6 col-sm-6">
            <div class="row contact-form1">
                <div id="valAlert2"></div>
                <h3>Tutor Form</h3>
                <form name="TutorForm"  onsubmit="return validateForm2()" method="post" id="TutorForm" >
                <fieldset class="col-md-6 col-sm-6">
                    <input id="fname" type="text" name="fname" placeholder=" First Name">
                </fieldset>
                <fieldset class="col-md-6 col-sm-6">
                    <input id="sname" type="text" name="sname" placeholder=" Surname">
                </fieldset>
                <fieldset class="col-md-6 col-sm-6">
                    <input id="uname" type="text" name="uname" placeholder=" User Name">
                </fieldset>
                <fieldset class="col-md-12">
                    <input type="email" name="email" id="email" placeholder="Email Address">
                </fieldset>
                 <fieldset class="col-md-12">
                    <input type="text" name="address" id="address" placeholder="Address">
                </fieldset>
                <fieldset class="col-md-12">
                    <input type="password" name="pass" id="pass" placeholder="Password">
                </fieldset>
                <fieldset class="col-md-12">
                    <input type="password" name="pass2" id="pass2" placeholder="Confirm Password">
                </fieldset>
                 <fieldset class="col-md-12">
                    <textarea name="subjects" id="subjects" placeholder="Please enter your specialist subjects that you are interested in teaching."></textarea>
                </fieldset>

                <fieldset class="col-md-12">
                    <textarea name="info" id="info" placeholder="Tell us any and all additional information about  yourself that you would like to appear on your profile."></textarea>
                </fieldset>
                <fieldset class="col-md-6 col-sm-6">
                    <input type="submit" name="send" value="Submit" id="submit" class="button">

                </fieldset>

                 <fieldset class="col-md-6 col-sm-6">
                    <input type="Reset" name="Reset" value="Reset Form" id="Reset" class="button" onclick="Reset()">
                </fieldset>
                </form>
                </div></div>