Edit in JSFiddle

$(function () {
    
    var $data = $('#data'),
        $reload = $('button'),
        loadCount = 0;
    
    $data.on('loadData', function (e) {
        loadCount++;
        $data.html('Phew! We have ' + loadCount + ' data(s) now. That was close.');
    });
    
    // Load initial data on DOM ready.
    setTimeout(function () {
        $data.trigger('loadData');
    }, 3000);
    
    $reload.click(function () {
        $data.trigger('loadData');
    });
    
});

<div id="data">No data!</div>
<button>Reload Data</button>