if (document.images) {
		
		if(!rootPath) var rootPath = '';
		
		var menu01on = new Image()
		menu01on.src = rootPath + "images/buttons/on/menu01.gif"
		var menu01off = new Image() 
		menu01off.src = rootPath + "images/buttons/off/menu01.gif"

		var menu02on = new Image()
		menu02on.src = rootPath + "images/buttons/on/menu02.gif"
		var menu02off = new Image() 
		menu02off.src = rootPath + "images/buttons/off/menu02.gif"

		var menu03on = new Image()
		menu03on.src = rootPath + "images/buttons/on/menu03.gif"
		var menu03off = new Image() 
		menu03off.src = rootPath + "images/buttons/off/menu03.gif"

		var menu04on = new Image()
		menu04on.src = rootPath + "images/buttons/on/menu04.gif"
		var menu04off = new Image() 
		menu04off.src = rootPath + "images/buttons/off/menu04.gif"
		
		
		var mapon = new Image()
		mapon.src = rootPath + "images/buttons/on/bt_map.gif"
		var mapoff = new Image() 
		mapoff.src = rootPath + "images/buttons/off/bt_map.gif"
		
		var contacton = new Image()
		contacton.src = rootPath + "images/buttons/on/bt_contact.gif"
		var contactoff = new Image() 
		contactoff.src = rootPath + "images/buttons/off/bt_contact.gif"
	}

function inact(imgName) {
	if (document.images)
    document[imgName].src = eval(imgName + 'off.src');
}

function act(imgName) {
  if (document.images)
    document[imgName].src = eval(imgName + 'on.src');
}