preloadimage("co","../images/co_off.gif","../images/co_on.gif");
preloadimage("wf","../images/wf_off.gif","../images/wf_on.gif");
preloadimage("ww","../images/ww_off.gif","../images/ww_on.gif");
preloadimage("ws","../images/ws_off.gif","../images/ws_on.gif");
preloadimage("chi","../images/chi_off.gif","../images/chi_on.gif");
preloadimage("eng","../images/eng_off.gif","../images/eng_on.gif");
preloadimage("close","../images/close_off.gif","../images/close_on.gif");