function returnObjById(id) {
	if(document.getElementById) {
		var returnVar = document.getElementById(id);
	}
	else if(document.all) {
		var returnVar = document.all[id];
	}
	else if(document.layers) {
		var returnVar = document.layers[id];
	}
	return returnVar;
}

function show_pop() {
	var popobj = returnObjById('popupguy');
	popobj.style.display = "block";
}

function hide_pop() {
	var popobj = returnObjById('popupguy');
	popobj.style.display = "none";
}

function load_img(imgnum) {
	close_all();
	var imgobj = returnObjById('img' + imgnum);
	returnObjById('currentimg').value = imgnum;
	imgobj.style.display = "block";
}

function next_img() {
	close_all();
	var currentimg = parseInt(returnObjById('currentimg').value);
	var firstimg = parseInt(returnObjById('firstimg').value);
	var lastimg = parseInt(returnObjById('lastimg').value);
	var nextimg = currentimg + 1;
	if(nextimg > lastimg) {
		var nextimg = firstimg;
	}
	var imgobj = returnObjById('img' + nextimg);
	returnObjById('currentimg').value = nextimg;
	imgobj.style.display = "block";
}

function prev_img() {
	close_all();
	var currentimg = parseInt(returnObjById('currentimg').value);
	var firstimg = parseInt(returnObjById('firstimg').value);
	var lastimg = parseInt(returnObjById('lastimg').value);
	var previmg = currentimg - 1;
	if(previmg < firstimg) {
		var previmg = lastimg;
	}
	var imgobj = returnObjById('img' + previmg);
	returnObjById('currentimg').value = previmg;
	imgobj.style.display = "block";
}