Hold to jump higher [SOLVED]

I have found a thread where user LIBERADO provided a solution, although i can not see what his solution was? (just shows a blank white screen for me). if anyone else can see his solution could you please provide it here, thanks 

http://community.stencyl.com/index.php/topic,35946.0.html

Here it is.
   
Create also a collision event that sets to 0 the Jump attribute only when the actor is on ground.

<a href="https://www.dropbox.com/s/ybcek9lq1uvl3s9/Variable%20Jump.swf?raw=1" target="_blank" class="new_win">https://www.dropbox.com/s/ybcek9lq1uvl3s9/Variable%20Jump.swf?raw=1</a>

cheers cheers

For anyone looking to see this after flash has been discontinued, here is an image of Liberado's code.