function wop(url,wnd_name,width,height){w=window.open(url,wnd_name,'width='+width+',height='+height+',status=no,menubar=no,resizable=yes,scrollbars=yes,left='+String((screen.width-width)/2)+',top='+String((screen.height-height)/2));w.focus();return w;}
function wop2(url){w=window.open(''+url+'?wop=1','auto','width=687,height='+String(3*screen.height/4)+',status=no,menubar=no,resizable=yes,scrollbars=yes,left='+String((screen.width-(3*screen.width/4))/2)+',top='+String((screen.height-(3*screen.height/4))/2));w.focus();return w;}