var timer;
var last = 0;;

function showSC(id) {
	clearTimeout(timer);
	if (last>0 && last!=id) hideSC();
	document.getElementById('sc'+id).style.display = 'block';
	last = id;
}

function timeSC() {
	timer = setTimeout('hideSC()', 200);
}

function hideSC() {
	/* for (i=0; i<categories.length; i++) {
		document.getElementById('sc'+categories[i]).style.display = 'none';
	} */
	document.getElementById('sc'+last).style.display = 'none';
}