function swapImage(aImage,aState)
{
	aImgSrc = aImage.src
	extension = aImgSrc.substr(aImgSrc.length-4,4)
	aImgSrc = aImgSrc.substr(0,aImgSrc.length-5)
	aImgSrc = aImgSrc + aState + extension
	aImage.src = aImgSrc
}