Hai eveyone

i need to create page loader in my project. the page loader image will be displayed on midle of the browser and i should be mask the main window.

because if the user intrupt the loading process of our project it give Conversation time out error ,

My project environment is
Jboss 4.2.0GA
Richface 3.0.1

please any one give me an idea how to create a page loader

By
Thiagu