<!--START
if(document.images){nexton=new Image();nexton.src="picts/next-on.gif"
nextoff=new Image();nextoff.src="picts/next-off.gif"
backon=new Image();backon.src="picts/back-on.gif"
backoff=new Image();backoff.src="picts/back-off.gif"}
function img_act(imgName){if(document.images){imgOn=eval(imgName+"on.src");document[imgName].src=imgOn;}}
function img_inact(imgName){if(document.images){imgOff=eval(imgName+"off.src");document[imgName].src=imgOff;}}