function showLayer(id) {
	var object = document.getElementById(id);
	if (object.style.display == 'block') {
		object.style.display = 'none'
	} else {
		object.style.display = 'block'	
	}
}

var Core = {};
Core.getElementsByClass = function(theClass) {
	var elementArray = [];
	if (document.all)
	{
	elementArray = document.all;
	}
	else
	{
	elementArray = document.getElementsByTagName("*");
	}
	var matchedArray = [];
	var pattern = new RegExp("(^| )" + theClass + "( |$)");
	
	for (var i = 0; i < elementArray.length; i++)
	{
	if (pattern.test(elementArray[i].className))
	{
	  matchedArray[matchedArray.length] = elementArray[i];
	}
	}
	return matchedArray;
};

function hideClass(classObj) {
	var list = Core.getElementsByClass(classObj);
	for (var i = 0; i < list.length; i++) {
	list[i].style.display = 'none';
	}
}

function overClass(classObj) {
	var list = Core.getElementsByClass(classObj);
	for (var i = 0; i < list.length; i++) {
	list[i].style.background = 'url(/pic/menuBg.gif)';
	list[i].style.color = '#616362';
	}
}


function showSub(id, obj) {
	if (id == 'all') {
		hideClass('submenu');
		overClass('menuLink');
	} else {
	hideClass('submenu');
	overClass('menuLink');
	obj.style.background = 'url(/pic/menuBgOver.gif)';
	document.getElementById(id).style.display = 'block';
	}
}