Acquired Opera AdBlock code

includes/cssFilter.js

Index: includes/cssFilter.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/includes/cssFilter.js
@@ -0,0 +1,32 @@
+// ==UserScript==
+// @include *
+// ==/UserScript== 
+
+opera.extension.onmessage = function (event) {
+	//opera.postError('INJECTED: got a ' + event.data.request + ' request for ' + document.location.href);
+	if(event.data.request == 'css') {//Ensure the received message is for the right URL
+		var css = document.getElementById(event.data.id);
+		if(!css) {
+			css = document.createElement('style');
+			css.setAttribute('type', 'text/css');
+			css.setAttribute('id', event.data.id);
+			css.setAttribute('class', 'OAB'); //To allow easy removal by the user to view the original source code
+			css.appendChild(document.createTextNode(event.data.reply));
+			try {
+				document.getElementsByTagName('html')[0].getElementsByTagName('head')[0].appendChild(css); //Only append if the file is an HTML file
+				//opera.postError('INJECTED: CSS added - ' + event.data.id);
+			}
+			catch(e) {}
+		}
+		else {
+			css.innerHTML = event.data.reply;
+			//opera.postError('INJECTED: CSS updated - ' + event.data.id);
+		}
+	}
+	else if(event.data.request == 'ping') {
+		if(event.data.type == 'css')
+			event.source.postMessage({request: 'css', url: document.location.href});
+	}
+};
+
+opera.extension.postMessage({request: 'css', url: document.location.href});