Acquired Opera AdBlock code

files/download.js

 function download(url) {
         if(url.indexOf("http") == 0) { //Only accepts http and https URLs
                 try {
                         var request = new window.XMLHttpRequest();
                         request.open('GET', url, false);
+                        if(opera.version() >= 12.1)
+                                request.timeout(12000); //Only supported in Opera 12.1+, 12 seconds timeout
                         request.send();
                         if (request.readyState == 4 && request.status == 200) {
                                 return request.responseText;
                         }
                 }
                 catch(e) {}
         }
         return false;
 }