function ShowSubcategories(elementID) {
	document.getElementById(elementID).style.visibility = 'visible';
	document.getElementById(elementID).style.display = 'block';
}

function HideSubcategories(elementID) {
	document.getElementById(elementID).style.visibility = 'hidden';
	document.getElementById(elementID).style.display = 'none';
}

function ShowHideSubcategories(elementID, linkId) 
{
	if(document.getElementById(elementID)){
		if (document.getElementById(elementID).style.visibility == 'hidden') {
			ShowSubcategories(elementID);
			document.getElementById(linkId).className = 'closeBtn';
		} else {
			HideSubcategories(elementID);
			document.getElementById(linkId).className = 'openBtn';
		}
	}
}