function hideSec(secName)
{	
	var sec = window.document.getElementById(secName);
	var img = window.document.getElementById(secName+"img");		
	var a = window.document.getElementById(secName+"a");		
	if (sec.style.display == 'none')
	{
		if (sec != null) sec.style.display = 'block';
		if (img != null)img.scr = 'images/ar.gif';
		if (a != null) a.innerText = ' (скрыть детали)';
	}
	else 
	{	
		if (sec != null) sec.style.display = 'none';
		if (img != null)img.scr = 'images/arup.gif';
		if (a != null) a.innerText = ' (подробнее)';
	}		
}