====== getTabCount ======
Returns the number of tabs.
===== Syntax =====
<code javascript>getTabCount = function();</code>

==== Returned value ====
  * //functions:// a number of tabs

===== Examples =====
  -<code javascript>//Create 10 tabs
for(var i = 0; i<9; i++) createTab();
//Get the number of tabs
var tabCount = getTabCount();
log(tabCount);</code>