WAD : Call Javascript Function only on Initial Load

Hi
I need to replicate the functionality found in the web template parameter ACTION_BEFORE_FIRST_RENDERING in a Javascript function. I need to to do this in order to read a querystring parameter, and then perform actions based on that querystring parameter.
Is there a way to either call a function from the ACTION_BEFORE_FIRST_RENDERING command, or how do I call my Javascript function only the 1st time the page is loaded?
I can call the Javascript function from the body onLoad event, but that results in the function being called every time the page loads, which is not what I want ... I only want the function called the 1st time the page is loaded.
Cheers,
Andrew

Seems you can use this parameter to check :
sapbi_page.m_requestIdValue
The first time a page is loaded, that value is 1. Thereafter, it increases. I can therefore put that check in my onLoad function, and call the stuff I need if it is 1, otherwise leave the function.
Cheers,
Andrew

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WAD : Call Javascript Function only on Initial Load

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