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.getElementById(changeImages.arguments[i]).src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		b_pipeflow1_over = newImage("images/b-pipeflow1-over.gif");
		b_pipeflow3_over = newImage("images/b-pipeflow3-over.gif");
		b_pipeflow14_over = newImage("images/b-pipeflow14-over.gif");
		b_pipeflow2_over = newImage("images/b-pipeflow2-over.gif");
		b_pipeflow5_over = newImage("images/b-pipeflow5-over.gif");
		b_pipeflow6_over = newImage("images/b-pipeflow6-over.gif");
		b_pipeflow7_over = newImage("images/b-pipeflow7-over.gif");
		b_pipeflow8_over = newImage("images/b-pipeflow8-over.gif");
		preloadFlag = true;
	}
}