How to display the "Loading message" while loading the page

Hi,

I want to show the loading message while loading the page.

I am using the below code to load the page..

isc.HTMLPane.create({
width:"100%",
contentsURL:pagePath,
contentsType: 'page',
overflow:"auto",
styleName:"defaultBorder"
})

PagePath: Jsp URL.

If I don't use the contentsType: 'page', My page is not loading.
So, I wanted to use contentsType as page and I need to display Loading message whileb loading any page.

Thanks,
Bhaskar