Hi Ed,

To add to what Teresa said,  when you use VO-Space this is a VoiceOver-specifc 
software shortcut that means "perform the default action" for a given situation 
-- which could be to click on an element.  VO-Shift-Space is another VoiceOver 
specific software shortcut for clicking your mouse cursor.  Pressing the return 
key will return the default selections in dialog windows, and is hardware-based 
and does not rely on whether you are using VoiceOver, but it doesn't have an 
effect when you are supposed to click with a mouse or trackpad on a web page 
element.

I usually distinguish between "hardware clicks" and "software clicks".  
Hardware clicks (with TrackPad, Mouse, or with the Mouse Keys accessibility 
solution) work everywhere.  VoiceOver-specific software keyclicks may work if 
an application is accessible, but otherwise may not work.

The other part of clicking on a web element such as a clickable element is 
making sure that your mouse cursor is actually on the element in question.  
(This is really annoying, because in some cases I have to change my cursor 
tracking preferences under VoiceOVer Utility to either "Mouse Cursor follows 
VoiceOver Cursor" or "Mouse Cursor moves VoiceOver Cursor" in order for things 
to work in environments of transitioning accessibility, such as in the iCloud 
or old Mobile Me web pages, or when iTunes or Automator was first being made 
accessible). However, in most instances you only need to make sure, after 
routing your mouse cursor to your VoiceOver cursor, that you issue a "hardware 
click".

Since I don't use a mouse with my Mac laptops, I usually click on elements 
using Mouse Keys.  If you are using a full size keyboard with NumPad Commander 
turned on, you can alternatively use the NumPad Commander shortcut to click (I 
think this is Control+"5" on the numeric keypad if you use the default 
settings, but you should check this).  And if you use the TrackPad you should 
turn off TrackPad Commander and make sure that you press down hard enough to 
register a click.

You should not have both Mouse Keys and NumPad Commander turned on at the same 
time, because they lead to conflicting key definitions.  (On a laptop, this can 
make some of your keys completely unusable until you sort this.) 

Mouse Keys is an accessibility solution for people with motion disabilities 
that make it difficult for them to move a mouse precisely to a link or form 
control where they need to click or activate or enter text.  VoiceOver users 
can use Mouse Keys in a couple of settings: 1) to click on elements like your 
clickable links where there are accessibility issues in the setup or 
application that prevent the VoiceOver shortcuts from working correctly and 2) 
to move the mouse cursor to screen locations independently of VoiceOver's 
navigation.  Again, case 2 is an accessibility problem area.  It may be that 
player controls can be activated by clicking on them, but the controls are not 
exposed to VoiceOver, so you can't move there independently.  However, if you 
can move your mouse cursor to that position, and click, you can activate the 
controls. If you set up VoiceOver to announce what's under the mouse as you 
move over the controls navigating with Mouse Keys, you can find out where the 
controls are and then click them.  Usually, you use external clues for the 
position of the controls so you're not exploring randomly.  Once your know 
where they are relative to a screen element that VoiceOver can see, you can 
navigate there again knowing the offsets.

Hope this sketchy explanation works.  On extended keyboards, the Mouse Keys are 
the 9 number keys of the numeric keypad, with the central "5" key acting as the 
current position of the mouse that can be clicked.  Pressing the number keys 
around that position moves the mouse one screen pixel in that direction (left, 
right, up, down, or diagonally).  So if you press the "4" key to the left of 
the "5", you move the mouse 1 pixel to the left.  Press the "6" key and move to 
the right.  Press the "8" key and move up, etc.

On a laptop the mouse keys are where the embedded numeric keypad used to be: 
the keys below the "7 8 9" keys on the right side of the keyboard, with "7 8 9" 
on the top row corresponding to "7 8 9" on the numeric keypad, "u i o"  for "4 
5 6", and "j k l" for "1 2 3".  So the "i" key is in the central position of 
the "5" key on the numeric keypad, and you click by pressing this key when 
Mouse Keys are turned on.

You can set up turning Mouse Keys on and off with 5 presses of the Option key.  
Go to the Accessibility under System Preferences with Option+F5, and in the 
Mouse & Trackpad pane check the box for "Press the Option key five times to 
turn Mouse Keys off and on", then close the window with Command+W.

So, route your mouse cursor to your VoiceOver cursor, turn Mouse Keys on, 
click, and then turn Mouse keys off.
This may be set up to click with Fn+"i" on a laptop under Mountain Lion, though 
just pressing "i" will work in Lion.  

HTH.  Cheers,

Esther


On 29 Jul 2013, at 11:06, Teresa Cochran wrote:

> Clickable elements can be very tricky, depending on how the web designer has 
> implemented Javascript. For example, on the concertwindow.com site, There are 
> several elements on the front page that rarely do anything when clicked. I 
> find that i have to try various methods on different sites, including 
> VO-shift-space, turn on mouse keys and do a num-pad-5, or use the trackpad. 
> Sometimes just VO-space works. The nice thing about mouse keys is that they 
> are actual mouse clicks and are not dependent on VO. Neither is the trackpad 
> when trackpad commander is turned off.
> 
> HtH,
> Teresa
> On Jul 29, 2013, at 1:42 PM, Maria and Joe Chapman <bubbygirl1...@gmail.com> 
> wrote:
> 
>> HI.  try routing the mouse to the vo cursor with vo command f 5 and doing a 
>> vo shift space twice to double click the mouse.
>> 
>> 
>> Maria and Joe Chapman
>> bubbygirl1...@gmail.com
>> 
>> 
>> 
>> On 30/07/2013, at 6:37 AM, Edward Green <ergreen1...@gmail.com> wrote:
>> 
>>> Hi,
>>> 
>>> Apologies if this seems like a silly question, but if Voiceover announces 
>>> that something is clickable on a web page, in OSX how do I click/activate 
>>> it? I've tried VO space as well as return, but haven't had any joy.
>>> 
>>> Many thanks,
>>> 
>>> Ed
>>> 

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