disabling back and forward button using included javascript file

[B Bhutta]

Hi,
I want to disable my back and forward buttons and I want to use an included file to call that function.
If I simply add this line of code:
"history.forward();"
It will work and there is no problem. However, in this case I have to add this line of code on each hmtl page. However, since we have a common javascript file, common.js, I created a method in this file as:
"function clearHistory()
{ history.forward();}"
and I included this file using :
script src="common.js"
and I call clearHistory method in onLoad mehtod of an html page "(on_Load="javascript:clearHistory();" )" but it doesn't work.
Does javascript source file doesn't get included before onload!

[Eric Pascarello]

If you have control over the links, you can use
document.location.replace that will overwrite the history of the current page.
alos look at this
http://www10.brinkster.com/A1ien51/basics/backbutton.htm
The onload event occurs after the entire page is loaded!
Eric