var title_html="Estudy";
var bgcolor_html="ffffff";
var window_name_html="html_estudy";
var window_handle_html;
var filename_html;
var width_html_auto=600;
var height_html_auto=400;
var scrollbars_html_auto='yes';

function open_html_window (user_filename_html, userwidth_html, userheight_html,userscrollbars_html) {
filename_html=user_filename_html;
width_html=width_html_auto;
height_html=height_html_auto;
scrollbars_html=scrollbars_html_auto;

if (userwidth_html>40){width_html=userwidth_html;};
if (userheight_html>40){height_html=userheight_html;};
if (userscrollbars_html>''){scrollbars_html=userscrollbars_html;};

window_handle_html = window.open(filename_html,window_name_html,"menubar=no,directories=no,location=no,resizable=no,scrollbars="+scrollbars_html+",width="+width_html +",height="+height_html+",left="+((screen.width-width_html)/2)+",top="+((screen.height-height_html-56)/2));
window_handle_html.focus();
}