// @run-at document-start

function f(){
try{
document.getElementById('quantity_1').value="25.00";
}catch(e){setTimeout(f,5);}
}
f();


will use some cpu (until it has done it's task), and its quite hackish, but 
i guess i think it should work
On Friday, 13 July 2012 00:15:15 UTC+2, Console wrote:
>
> I want to immediately change this javascript value on the fly before it 
> redirects me to the page with grease monkey. I am a novice on grease monkey 
> and spent quiet of a few hours reading and experimenting with no luck, if 
> anyone can give me a helping hand on this I would appreciate it. This is 
> the code I want to replace: 
>
> " <input id="quantity_1" name="quantity_1" type="hidden" value="20.00" /> 
> "
>
> to 
>
> " " <input id="quantity_1" name="quantity_1" type="hidden" value="25.00" 
> /> "
> If any more info is needed let me know, thank you in advance. 
>

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