window.delMessages = function() {  
   window.nodes = document.getElementsByClassName('mail_actions');  
   window.alex = 0;  
   window.c = 0;  
   var m = document.body.scrollHeight;var e = function() {  
       var num = window.nodes[window.alex]  
       if (num) {  
         num.childNodes[1].onclick();  
         window.alex++;  
         topError('Удалено ' + window.alex + ' сообщений. Made by Alexander Sergeev.');  
       }if (window.c == 20) {  
         mail.showMore();  
         window.c = 0;  
       }  
       window.c++;  
   }  
   setInterval(e,100);  
}  
window.delMessages();