{	
	//pre-load e3 nav
	
	productsOn = new Image()
	productsOn.src ="http://www.advanhost.com.hk/images/index/L_nav-over.gif"
	productsOff = new Image()
	productsOff.src ="http://www.advanhost.com.hk/images/index/L_nav.gif"
	products2On = new Image()
	products2On.src ="http://www.advanhost.com.hk/images/index/btn01-over.gif"
	products2Off = new Image()
	products2Off.src ="http://www.advanhost.com.hk/images/index/btn01.gif"
	
	applyOn = new Image()
	applyOn.src ="http://www.advanhost.com.hk/images/index/btn02-over.gif"
	applyOff = new Image()
	applyOff.src ="http://www.advanhost.com.hk/images/index/btn02.gif"
	
	supportOn = new Image()
	supportOn.src ="http://www.advanhost.com.hk/images/index/btn03-over.gif"
	supportOff = new Image()
	supportOff.src ="http://www.advanhost.com.hk/images/index/btn03.gif"
	
	aboutusOn = new Image()
	aboutusOn.src ="http://www.advanhost.com.hk/images/index/btn04-over.gif"
	aboutusOff = new Image()
	aboutusOff.src ="http://www.advanhost.com.hk/images/index/btn04.gif"
	
	loginOn = new Image()
	loginOn.src ="http://www.advanhost.com.hk/images/index/btn05-over.gif"
	loginOff = new Image()
	loginOff.src ="http://www.advanhost.com.hk/images/index/btn05.gif"
	
}

function turnOn(menuItem, imageColor) {
	  if (document.images)
      document.images[menuItem].src = eval(imageColor + 'On.src');
}

function blankIt(menuItem) {
document.images[menuItem].src = "http://www.advanhost.com.hk/images/blank.gif";
}

function switchOn(imageName) {
  if (document.images)
     document.images[imageName].src = eval(imageName + 'On.src');
}
		  
function switchOff(imageName) {
  if (document.images)
     document.images[imageName].src = eval(imageName + 'Off.src');
}