How to make Image Load before display html page

[woooody]

1) Script Title: Dynamic Ajax Content

2) Script URL (on DD): http://www.dynamicdrive.com/dynamici...jaxcontent.htm

3) Describe problem:


How to make Image Loading before html page display,, like this image,,
http://www.shougun.it/images/loading.gif

http://www.oshawa.ca/images/loading.gif

thanks,