function displayWindow(theURL,winName,width,height) {
    var window_width = width;
    var window_height = height;
    var window_top = (screen.height-window_height)/2;
    var window_left = (screen.width-window_width)/2;
    newWindow=window.open(theURL ,winName,"toolbar=no,statusbar=yes,location=no,scrollbars=no,resizable=yes,width=" + window_width + "',height=" + window_height )


    newWindow.focus();
}