How to save values from modal popup to html table

Question

My modal has few fields like & some more I want to save this data to Html table & on final save it to the database. Please help I am looking for web method Ajax call

<div class="form-group">
<label for="message-text" class="col-form-label">Subject:</label>
<textarea class="form-control" id="message-text"></textarea>
</div>
<div class="col-sm-* col-md-3 col-lg-3">
<label for="message-text" class="col-form-label">Message:</label>
<div id="msg"></div>(From editor)
</div>
<div class="col-sm-* col-md-3 col-lg-3">
<label for="sub-input" class="col-2 col-form-label">Priority </label>
<div class="col-2">
<input class="form-control" id="msg-input" onkeyup="numericFilter(this);" data-bind="value: priority" />
</div>
</div>
<button type="button" class="btn btn-primary" onclick="save()">Save changes</button>