//<!-- javascript slideshow script -->
var opera = navigator.userAgent.indexOf('Opera')>=0 ? true : false;
var ie4 = document.all;
var ns6 = document.getElementById&&!document.all;
var ns4 = document.layers&&!document.getElementById;

function slideShow(dirn) {
	//alert("show");
	var pic, caption, posn;
	var prefix = '/slides/';
	if (!document.posn) posn = 0;
	else posn = document.posn;
	if (posn >= pics.length) posn = 0;
	//alert(posn+" "+pics.length);
	// requires 2 global arrays - pics and caps
	// also an html img tag called 'pic' and a <P> tag called 'label'
	if (dirn == 'fwd') {
		posn++;
		if (posn >= pics.length) posn=0;
	}
	else if (dirn == 'back') {
		posn--;
		if (posn < 0) posn = pics.length-1;
	}
	else posn = 0; // error or start
	var replacepic = ie4? document.all.pic.src = prefix+pics[posn] : document.pic.src = prefix+pics[posn];
	var replacealt = ie4? document.all.pic.alt = caps[posn] : document.pic.alt = caps[posn];
	//document.title = caps[posn];
	var capobj = ie4? document.all.label : ns6? document.getElementById("label") : document.label;
	var replacecap = capobj.innerHTML = caps[posn]+"<br/>Image "+(posn+1)+" of "+pics.length+" ";
	document.posn = posn;
}