// Listen for document click to close non-modal dialog
$(document).mousedown(function(e) {
    var clicked = $(e.target); // get the element clicked
    if (clicked.is('#dlg') || clicked.parents().is('#dlg') || clicked.is('.ui-dialog-titlebar')) {
        return; // click happened within the dialog, do nothing here
    } else { // click was outside the dialog, so close it
        $('#dlg').dialog("close");
    }
});