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) {
			ndx_01_bl_over = newImage("images/ndx_01-bl_over.gif");
			ndx_01_qc_over = newImage("images/ndx_01-qc_over.gif");
			ndx_01_vs_over = newImage("images/ndx_01-vs_over.gif"); 
			ContentBtm_VS = newImage("images/ContentBtm_VS.gif"); 
			ContentBtm_QC = newImage("images/ContentBtm_QC.gif"); 
			ContentBtm_BL = newImage("images/ContentBtm_BL.gif"); 
			ContentBtm_BL = newImage("images/ContentBtm_tmp.jpg"); 
			ContentBtm_BL = newImage("images/ContentBtm_DS.gif");
			ContentBtm_BL = newImage("images/ContentBtm_SP.gif");
			ContentBtm_BL = newImage("images/ContentBtm_GA.gif");
			ContentBtm_BL = newImage("images/ContentBtm_WB.gif");
			preloadFlag = true;
		}
	}