// JavaScript Document
<!-- Hide from old browsers
//Image Changer IE4,5,6 and NS 6
//Copyright &copy; R Kale
//Featured at http://activegraphy.com/
//This may be used freely as long as this message is intact

	var prefix ="gallery/b2b-london"
	var suffix =".jpg"
	var lastNo = 19
	var i = 1;
function gallery(){
	if (i == 1){
		document.gallery.first.disabled=true;
		document.gallery.previous.disabled=true;
		document.gallery.next.disabled=false;
		document.gallery.last.disabled=false;}
}
function previmg(){
	if (i != 1) {
		i --
		document.img.src =prefix+i+suffix
		document.gallery.first.disabled=false;
		document.gallery.previous.disabled=false;
		document.gallery.next.disabled=false;
		document.gallery.last.disabled=false;}
	if (i == 1) {
		document.gallery.first.disabled=true;
		document.gallery.previous.disabled=true;
		document.gallery.next.disabled=false;
		document.gallery.last.disabled=false;}
}

function nextimg(){
	if (i != lastNo) {
		i ++
		document.img.src =prefix+i+suffix
		document.gallery.first.disabled=false;
		document.gallery.previous.disabled=false;
		document.gallery.next.disabled=false;
		document.gallery.last.disabled=false;}
	if (i == lastNo){
		document.gallery.first.disabled=false;
		document.gallery.previous.disabled=false;
		document.gallery.next.disabled=true;
		document.gallery.last.disabled=true;}
}

function firstimg(){
	i = 1
	document.img.src =prefix+i+suffix
	document.gallery.first.disabled=true;
	document.gallery.previous.disabled=true;
	document.gallery.next.disabled=false;
	document.gallery.last.disabled=false;
}
function lastimg(){
	i = lastNo
	document.img.src =prefix+i+suffix
	document.gallery.first.disabled=false;
	document.gallery.previous.disabled=false;
	document.gallery.next.disabled=true;
	document.gallery.last.disabled=true;	
}
// -- End Hiding Here -->