function imgCbox(N, tabstop)
{
	var objs, cboxes, Img, Span, A;

	objs = document.getElementsByTagName("INPUT");
	if (N == undefined) return false;
	if (tabstop == undefined) tabstop = true;

	for (var i=0; i < objs.length; i++) {
		if (objs[i].type != "checkbox" || objs[i].name != N) continue;
		
		if (imgCbox.Objs[N] == undefined) {
			imgCbox.Objs[N] = [];
			imgCbox.Imgs[N] = [];
			imgCbox.ImgObjs[N] = [];
		}
		
		var len = imgCbox.Objs[N].length;
		imgCbox.Objs[N][len] = objs[i];
		imgCbox.Imgs[N][len] = {};

		// for image cache
		(Img = new Image()).src = objs[i].getAttribute("onsrc");
		imgCbox.Imgs[N][len]["on"] = Img;

		(Img = new Image()).src = objs[i].getAttribute("offsrc");
		imgCbox.Imgs[N][len]["off"] = Img;

		// image element
		Img = document.createElement("IMG");
		Img.src = objs[i].checked?objs[i].getAttribute("onsrc"):objs[i].getAttribute("offsrc");
		Img.style.borderWidth = "0px";
		Img.onclick = new Function("imgCbox.onclick('"+N+"','"+len+"')");
		imgCbox.ImgObjs[N][len] = Img;

		// anchor element for tab stop
		A = document.createElement("A");
		if (tabstop) {
			A.href = "javascript:;";
			A.onkeypress = new Function("evt", "if(evt==undefined)evt=event;if(evt.keyCode==13){ imgCbox.onclick('"+N+"','"+len+"'); }");
		}
		A.style.borderWidth = "0px";
		A.appendChild(Img);

		// insert object
		Span = objs[i].parentNode;
		Span.style.display = "none";
		Span.parentNode.insertBefore(A, Span);
	}
}
imgCbox.onclick = function(N, idx) {
	var C = imgCbox.Objs[N][idx];
	var I = imgCbox.ImgObjs[N][idx];

	C.checked = !C.checked;
	I.src = imgCbox.Imgs[N][idx][C.checked?"on":"off"].src;
	alert(I.src)
	// fire event
	if (C.onclick != undefined || C.onclick != null) C.onclick();
}
imgCbox.Objs = {};
imgCbox.Imgs = {};
imgCbox.ImgObjs = {};