page url:
example:
refresh seconds: 60
item selector: eg: .inzeraty
element selector: eg: .nadpis a

alarm_expression(ITEM, ELEM) {...}
if (isNewLink(ELEM)) { playsnd(); ITEM.css('background', '#afa'); ITEM.click( function() { setOldLink(ELEM); ITEM.css('background', ''); }); }
eg: if ($(this).attr('href')=='gule') playsnd();