function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nAbt_over = newImage("images/nAbt2.gif");
		nPro_over = newImage("images/nPro2.gif");
		nCont_over = newImage("images/nCont2.gif");
		nHom_over = newImage("images/nHom2.gif");
		nPtoil_over = newImage("images/nPtoil2.gif");
		nPwipe_over = newImage("images/nPwipe2.gif");
		nPfold_over = newImage("images/nPfold2.gif");
		nPhand_over = newImage("images/nPhand2.gif");
		nPnapk_over = newImage("images/nPnapk2.gif");
		nPmedi_over = newImage("images/nPmedi2.gif");
		nPdisp_over = newImage("images/nPdisp2.gif");
		preloadFlag = true;

	}
}