function getobject(obj) {

	if (document.getElementById)
		return document.getElementById(obj)
	else if (document.all)
		return document.all[obj]
		
}

cur_img = -1;
num_imgs = 0;
img_array = new Array();

function ChangeImage(fwd) {

	if (fwd) {
	
		if (++cur_img==num_imgs) {
			
			cur_img=0;
			
		}
	
	} else {
	
		if (cur_img==0) {
			
			cur_img=num_imgs;
			
		}
		
		cur_img--;
			
	}
	
	Update();
	
}

function Update(){
getobject("img").src = img_array[cur_img][0];
getobject("img_desc").href = img_array[cur_img][1];
getobject("img_number").innerHTML = cur_img + 1;
getobject("total_imgs").innerHTML = num_imgs;
}

function prev_img()
{
ChangeImage(false);
}
function next_img()
{
ChangeImage(true);
}

if (document.getElementById||document.all) window.onload=next_img