function newImage(img){
	var i=new Image();
	i.src='btnImages/'+img;
	return i;
}

function imgOut(objImage){
	objImage.src = newImage(objImage.name.substring(0,objImage.name.length-1)+'Out.gif').src;
}

function imgDown(objImage){
	objImage.src = newImage(objImage.name.substring(0,objImage.name.length-1)+'Down.gif').src;
}

function imgOver(objImage){
	objImage.src = newImage(objImage.name.substring(0,objImage.name.length-1)+'Over.gif').src;
}