Weather Bootstrap

<!DOCTYPE html>
<html>

<body>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="http://code.jquery.com/jquery-2.0.0.js"></script>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap-theme.min.css">
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
    <script language="javascript" type="text/javascript">

//Function

function foo(callback) {
    $.ajax({
    url: "http://api.openweathermap.org/data/2.5/weather?q=London",
    dataType: 'JSON',
    success: callback
    });
}

function myCallback(result) {
var temp = JSON.stringify(JSON.parse(result.main.temp));
var Kelvin = 272;
var Centigrade = temp-Kelvin;
$('span.temp-val').text(Centigrade);
}


$(document).ready(function(){
    $(".popover-examples a").popover({
        title : 'Weather App',
        trigger: 'hover',
        template: '<div class="popover"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div><img src="http://lorempixel.com/100/100" /><span class="temp-val">Just an example of inserting image in a Popover...</span></div>'
    });

    $(".popover-examples a").hover(function() { myCallback(); })
});
    </script>
    <div class="bs-example">
    <p class="popover-examples">
        <a href="#" class="btn btn-lg btn-primary" data-toggle="popover" >Popover Example</a>
    </p>
</div>
</body>


</html>