var fake_element;

function bsGetElementById(id) {

if (document.getElementById(id)) {
	return document.getElementById(id);
	} else if (document.all[id]) {
		return document.all[id];
		} else if (document.layers && document.layers[id]) {
			return (document.layers[id]);
			} else {
				return fake_element;
			}
}



function showImgSelected(imgId, selectId, imgDir, extra, bsUrl) {
	if (bsUrl == null) {
		bsUrl = "./";
	}
	imgDom = bsGetElementById(imgId);
	selectDom = bsGetElementById(selectId);
	imgDom.src = bsUrl + ""+ imgDir + "" + selectDom.options[selectDom.selectedIndex].value + extra;
}