$(document).ready(function() {
    $(window).load(computeTime());
    
});



var Aufrufzeit = new Date();
var Diff = 0;

function computeTime() {
    var AktuelleZeit = new Date();
    Diff = parseInt((AktuelleZeit.getTime() - Aufrufzeit.getTime()) / 1000);
    
    saveTime();
    setTimeout("computeTime()", 60000);
}
function saveTime() {
    
    Diff = String(Diff);
    $.get("api/webstatistic/timeframe.php", { tf: Diff },
       function(returned_data) {
       
       });

}