function preloadMoreImages() {
if (document.images)
	{
	var btn_sitecredits_roll = new Image
		btn_sitecredits_roll.src = "images/btn_sitecredits_over.gif"
	var btn_introduction_roll = new Image
		btn_introduction_roll.src = "images/btn_introduction_over.gif"
	var btn_archethics_roll = new Image
		btn_archethics_roll.src = "images/btn_archethics_over.gif"
	var btn_sharing_roll = new Image
		btn_sharing_roll.src = "images/btn_sharing_over.gif"
	var btn_labprocessing_roll = new Image
		btn_labprocessing_roll.src = "images/btn_labprocessing_over.gif"
	var btn_flotation_roll = new Image
		btn_flotation_roll.src = "images/btn_flotation_over.gif"
	var btn_ceramicanalysis_roll = new Image
		btn_ceramicanalysis_roll.src = "images/btn_ceramicanalysis_over.gif"
	var btn_lithicanalysis_roll = new Image
		btn_lithicanalysis_roll.src = "images/btn_lithicanalysis_over.gif"
	var btn_nativecopper_roll = new Image
		btn_nativecopper_roll.src = "images/btn_nativecopper_over.gif"
	var btn_faunalanalysis_roll = new Image
		btn_faunalanalysis_roll.src = "images/btn_faunalanalysis_over.gif"
	var btn_floralanalysis_roll = new Image
		btn_floralanalysis_roll.src = "images/btn_floralanalysis_over.gif"
	var btn_humanremains_roll = new Image
		btn_humanremains_roll.src = "images/btn_humanremains_over.gif"
	var btn_soilschemical_roll = new Image
		btn_soilschemical_roll.src = "images/btn_soilschemical_over.gif"
	var btn_dating_roll = new Image
		btn_dating_roll.src = "images/btn_dating_over.gif"
	var btn_curation_roll = new Image
		btn_curation_roll.src = "images/btn_curation_over.gif"
	}
}