function initNav(sNavID){
	var oNav = getObject(sNavID)
	oNav.onmouseover = function(){replaceImage(sNavID,sNavID + 'Over.png')}
	oNav.onmouseout = function(){replaceImage(sNavID,sNavID + 'Off.png')}
}

function setDefaultNav(sNavID){
	var oNav = getObject(sNavID)
	replaceImage(sNavID,sNavID + 'Over.png')
	
	oNav.onmouseover = function(){}
	oNav.onmouseout = function(){}
}