ajax call example

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#save").click(function(e){
e.preventDefault();
alert("hi");
var title=$("#title").val();
var desc=$("#title_desc").val();

var dataString = 'title='+ title + '&desc='+ desc;
$.ajax({
url:'http://localhost/CodeIgniter-3.1.0/index.php/welcome/showData',
type:'POST',
data:dataString,
success:function (response){
debugger;
alert("res");
}
});
});
});
</script>