function preloadMoreImages() {
if (document.images)
	{
	var btn_introduction_roll = new Image
		btn_introduction_roll.src = "images/btn_introduction_over.gif"
	var btn_wiscmiss_roll = new Image
		btn_wiscmiss_roll.src = "images/btn_wiscmiss_over.gif"
	var btn_missfarmers_roll = new Image
		btn_missfarmers_roll.src = "images/btn_missfarmers_over.gif"
	var btn_overviewpdf_roll = new Image
		btn_overviewpdf_roll.src = "images/btn_overviewpdf_over.gif"
	var btn_misssettlements_roll = new Image
		btn_misssettlements_roll.src = "images/btn_misssettlements_over.gif"
	var btn_misstools_roll = new Image
		btn_misstools_roll.src = "images/btn_misstools_over.gif"
	var btn_misslifestyle_roll = new Image
		btn_misslifestyle_roll.src = "images/btn_misslifestyle_over.gif"
	var btn_oneota_roll = new Image
		btn_oneota_roll.src = "images/btn_oneota_over.gif"
	var btn_oneotafarmers_roll = new Image
		btn_oneotafarmers_roll.src = "images/btn_oneotafarmers_over.gif"
	var btn_oneotasettlements_roll = new Image
		btn_oneotasettlements_roll.src = "images/btn_oneotasettlements_over.gif"
	var btn_oneotatools_roll = new Image
		btn_oneotatools_roll.src = "images/btn_oneotatools_over.gif"
	var btn_oneotalifestyle_roll = new Image
		btn_oneotalifestyle_roll.src = "images/btn_oneotalifestyle_over.gif"
	}
}