/*
************************************************************
  Added by Lev Gorenstein.  Extra functions to provide 
  help on keyboard support.
************************************************************

  Keyboard support
    Keys:
      RIGHT Arrow  : Next page
      LEFT Arrow   : Previous page
      Page UP      : Index page
      HOME         : First page
      END          : Last page
      S,s          : Toggle start/stop slide show (not in index)
      I,i          : Toggle exif info (not in index)
    Tested on: IE6, Mozilla 1.4, Netscape 7.1, Opera 7.2

    Bugs:
     - HOME,END doesn't work in Opera
************************************************************
*/


var showingHelp = false;


//// Show keyboard shortcuts

function toggleHelp() 
{
	if (showingHelp == false) 
	{
		if (document.getElementById) // IE5+ & Gecko
			document.getElementById("keyboardHelp").style.visibility="visible";
		else if (document.all) // IE4
			document.all["keyboardHelp"].style.visibility="visible";
		else // Netscape 4
			document.layers["keyboardHelp"].visibility="show";
		showingHelp = true;
	}
	else 
	{
		if (document.getElementById) // IE5+ & Gecko
			document.getElementById("keyboardHelp").style.visibility="hidden";
		else if (document.all) // IE4
			document.all["keyboardHelp"].style.visibility="hidden";
		else // Netscape 4
			document.layers["keyboardHelp"].visibility="hide";
		showingHelp = false;
	}

	// For JS keyboard support
	takenAction = false;
}