Window.confirm/alert is pretty much the only thing that can halt Javascript
execution.
You have to refactor your code a bit. Instead of
public boolean doPost(String url, String postData)
you should use
public void doPost(String url, String postData, Callback..., ...
callback) {
I followed the instruction from the following link:
http://netbeans.org/kb/docs/web/quickstart-webapps-gwt.html#creating
and got the following error when I run the project:
[gae:run]
Monitor failed to start
java.net.BindException: Address already in use: JVM_Bind
at
I went back and read similar posts and realized that they all indicated a
specific port number. The error in my run does not. I went back and
reviewed the steps in the instruction,
http://netbeans.org/kb/docs/web/quickstart-webapps-gwt.html#creating,
again, I found one mistake: Instead of
