Broken links/files in Yealink site

[Mauro]

Tried with a Motorola Milestone 2 Android 2.2 phone (with built-in browser and with Opera Mobile browser 12.10) and with a Samsung Galaxy S Pro Android 2.3 phone (with built-in browser).
When I click on the "Support" button, the menu expands only for an instant, then this page is loaded, with the menu closed again. It's almost impossible to click one of the items inside the menu before it closes due to page loading.

Now trying with a Fujitsu Lifebook Windows 7 Tablet PC, instead (I take in account the "finger" input only (no mouse-overing possible), while that PC also has a "pen" that supports "mouse-overing" if keeping the pen next to the screen, without touching it)...
- With Internet Explorer 9, Mozilla Firefox 17.0.1, and Google Chrome 23, the link is immediately followed when I tap on the "Support" word, but this time, the menu I previosly selected expands automatically again after the page loads. This may be okay.
- With Opera Browser 12.12, the menu is not expanded again after the page loads...