var current=1;

function setImg(num){
	document.getElementById('thumb'+current).src='img/tn/do_0'+current+'bw.jpg';
	document.getElementById('mainpic').src='img/do_0'+num+'.jpg';
	document.getElementById('thumb'+num).src='img/tn/do_0'+num+'.jpg';
	current=num;
}

function mouseout(num) {
	if (num == current) return;
	document.getElementById('thumb'+num).src='img/tn/do_0'+num+'bw.jpg';
}

function mouseover(num) {
	document.getElementById('thumb'+num).src='img/tn/do_0'+num+'.jpg';
}

function nextImg(){
	var num = current + 1;
	if (num > 8) num = 1;
	setImg(num);
}

var currentTxt=1;

function mouseoutTxt(num,name) {
	if (num == currentTxt) return;
	document.getElementById('btn_'+name).src='img/link_'+name+'.gif';
}

function mouseoverTxt(num,name) {
	document.getElementById('btn_'+name).src='img/link_'+name+'_over.gif';
}