<script type="text/javascript">
//<![CDATA[
function saveImage() {
    // moved if statement to function
    if ($("#image-canvas").length > 0) {
        $("#image-canvas").height($($(this).attr('data-print-area')).height());
        $("#image-canvas").width($($(this).attr('data-print-area')).width());
        $($(this).attr('data-print-area')).html2canvas({
            onrendered: function (canvas) {
                var formdata = {
                    image_code:canvas.toDataURL('image/png')
                };
                // console.log(formdata);
                $.post('screenshot/saveimage.php', formdata, function(msg) {
                    console.log(msg);
                    window.location.href = msg;
                });
            }
        });
    } else {
        // @todo maybe some feedback here like "can't save image"?
    }
} // function saveImage


$(document).ready(function() {
    // save image on load
    saveImage();


    // save image on click
    $(".save-image").on('click', function() {
        saveImage();
    });
});
//]]>
</script>