document.getElementById and displayed table

Hi,

In this example, I put 3 buttons with script to make appears/disappears some tables in a report. This report is running good in the embedded viewer (rcp_report designer : webviewer or html viever) but when I put it on my website running the same version of webviewer, the 3 buttons aren't active.
The url to run the report is :
http://.........:8080/Projet_Metro/run?__report=report/mobile/show_hide_button_vk_260.rptdesign

Have I forget something ??

Thanks in advance for your answer

Vincent