<!--
function preload(imgObj,imgSrc) {
	if (document.images) {
		eval(imgObj+' = new Image()')
		eval(imgObj+'.src = "'+imgSrc+'"')
	}
}

preload('hydroponics','/images/nav_hydroponics_on.gif')
preload('lighting','/images/nav_lighting_on.gif')
preload('nutrients','/images/nav_nutrients_on.gif')
preload('environmental','/images/nav_environmental_on.gif')
preload('pestcontrol','/images/nav_pestcontrol_on.gif')
preload('pond','/images/nav_pond_on.gif')
preload('information','/images/nav_information_on.gif')
//-->