Для чего нужна стандартная функция subscribe в DLE?

function subscribe(a){DLEconfirm(dle_sub_agree,dle_confirm,function(){ShowLoading("");$.get(dle_root+"engine/ajax/controller.php?mod=commentssubscribe",{news_id:a,skin:dle_skin,user_hash:dle_login_hash},function(a){HideLoading("");a.success?DLEalert(a.info,dle_info):a.error&&DLEalert(a.errorinfo,dle_info)},"json")});return!1}

function DLEconfirm(a,c,b){var d={};d[dle_act_lang[1]]=function(){$(this).dialog("close");$("#dlepopup").remove()};d[dle_act_lang[0]]=function(){$(this).dialog("close");$("#dlepopup").remove();b&&b()};$("#dlepopup").remove();$("body").append("<div id='dlepopup' class='dle-confirm' title='"+c+"' style='display:none'>"+a+"</div>");$("#dlepopup").dialog({autoOpen:!0,width:500,resizable:!1,dialogClass:"modalfixed dle-popup-confirm",buttons:d});$(".modalfixed.ui-dialog").css({position:"fixed"});$("#dlepopup").dialog("option","position",{my:"center",at:"center",of:window})}