Hook up onJsAlert on android.

src/android/com/unprompted/tildefriends/TildeFriendsActivity.java

@@ -207,6 +207,23 @@ public class TildeFriendsActivity extends Activity {
 				return true;
 			}
 
+			@Override
+			public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
+				new AlertDialog.Builder(view.getContext())
+					.setTitle("Tilde Friends")
+					.setMessage(message)
+					.setNeutralButton(android.R.string.ok, new DialogInterface.OnClickListener()
+					{
+						public void onClick(DialogInterface dialog, int which)
+						{
+							result.confirm();
+						}
+					})
+					.create()
+					.show();
+				return true;
+			}
+
 			/*
 			** https://stackoverflow.com/questions/5907369/file-upload-in-webview
 			** https://stackoverflow.com/questions/8586691/how-to-open-file-save-dialog-in-android