function displaySelector(item)
{
	var obj;
	obj = document.getElementById(item);
	if (obj.style.display != "none"){
		obj.style.display = "none";
		//document.getElementById('span-dotted').className = "dotted";
		document.getElementById('c-arrow').src = "http://img.ngs.ru/press/i/selector.gif";
	}else{
		obj.style.display = "block";
		//document.getElementById('span-dotted').className = "none";
		document.getElementById('c-arrow').src = "http://img.ngs.ru/press/i/selector-g.gif";
	}
}