<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<div class="col-md-12 pd-10">
<h3>Java Script Number Only area </h3>
<div class="col-md-2"><h4>Type only Number</h4> </div>
<div class="col-md-4"><INPUT id="txtNumber" placeholder="XXX - XXX - XXXX" onkeypress="return isNumberKey(event)" type="text" name="txtNumber"> </div>
</div>
<div class="col-md-12 pd-10">
<h3>Java Script Only Text area </h3>
<div class="col-md-2"><h4>Type only Text </h4> </div>
<div class="col-md-4"><INPUT id="txtCharacter" onkeypress="return isNumericKey(event)" type="text" name="txtCharacter"> </div>
</div>
<div class="col-md-12 pd-10">
<h3>Java Script only 4 number's/character's </h3>
<div class="col-md-2"><h4>Only 4 number :</h4> </div>
<div class="col-md-4"> <INPUT id="txtNumber" placeholder="4 character only" onkeypress="return isNumberKey(event)" type="text" name="txtNumber" maxlength="4"> </div>
</div>
</div>
</div>
