Time Taken to Bind a Grid

In this blog I have shown how to find the time taken to load a grid after grid bind.

function beforld() {
    //alert("hii");
    document.getElementById("hdntime").value = new Date().getTime();
}
function pageloadingtime() {
    document.getElementById("lbl_msg").innerText = "";
    var beforeload = document.getElementById("hdntime").value;
    // alert(beforeload);
    //calculate the current time in afterload
    var _grid = igtbl_getGridById('<%= Grid1.ClientID %>');
    var row1 = _grid.Rows.getRow(0);
    if (document.getElementById("hdntime").value != '') {
        //afterload = (new Date()).getTime();
        afterload = new Date().getTime();
        // alert(afterload);
        // now use the beforeload and afterload to calculate the seconds
        // seconds = (afterload - beforeload) / 1000;
        seconds = (afterload - beforeload);
        var daysDifference = Math.floor(seconds / 1000 / 60 / 60 / 24);
        seconds -= daysDifference * 1000 * 60 * 60 * 24
        var hoursDifference = Math.floor(seconds / 1000 / 60 / 60);
        seconds -= hoursDifference * 1000 * 60 * 60
        var minutesDifference = Math.floor(seconds / 1000 / 60);
        seconds -= minutesDifference * 1000 * 60
        var secondsDifference = Math.floor(seconds / 1000);
        seconds -= secondsDifference * 1000;
        var milisecondsDifference = Math.floor(seconds);
        // If necessary update in window.status
        // window.status = 'Your Page Load took  ' + seconds + ' second(s).';
        // Place the seconds in the innerHTML to show the results
        document.getElementById('lbl_msg').innerText = 'Time taken = ' + daysDifference + ' day/s ' + hoursDifference + ' hour/s ' + minutesDifference + ' minute/s ' + secondsDifference + ' second/s ' + milisecondsDifference + ' milisecond/s ';
    }
    else
        document.getElementById("lbl_msg").innerText = "";
}


Here I am taking a grid "Grid1",hidden field "hdntime" and a label "lbl_msg" to show time.