if (document.images) {
	
	callforpapersOn = new Image(108,22)
	callforpapersOn.src = "images/nav_callforpapers_on.gif"
	
	callforpapersOff = new Image(108,22)
	callforpapersOff.src = "images/nav_callforpapers_off.gif"
	
	speakersOn = new Image(108,22)
	speakersOn.src = "images/nav_speakers_on.gif"
	
	speakersOff = new Image(108,22)
	speakersOff.src = "images/nav_speakers_off.gif"
	
	indexOn = new Image(50,22)
	indexOn.src = "images/nav_index_on.gif"
	
	indexOff = new Image(50,22)
	indexOff.src = "images/nav_index_off.gif"

	
	}