function ShowSubMenu(id) {
	if(CurElem != 'sub0'){
		prevElem = document.getElementById(CurElem);
		if(prevElem){
			prevElem.style.display = 'none';
		}
	}
	if(ParElem != 'menu0'){
		prevParElem = document.getElementById(ParElem);
		prevParElem.style.background = '#353774';
		var links = prevParElem.getElementsByTagName('a');
		for(i=0;i<links.length;i++){
			links[i].style.color = '#ffffff';
		}
	}
	subElem = document.getElementById('sub'+id);
	if(subElem){
		subElem.style.display = 'block';
	}
	parentEl = document.getElementById('menu'+id);
	parentEl.style.background = '#353774';
	var links = parentEl.getElementsByTagName('a');
	for(i=0;i<links.length;i++){
		links[i].style.color = 'white';
	}
	CurElem = 'sub'+id;
	ParElem = 'menu'+id;
}