function showSubItem(img,id) {

	if (img.alt=='plus') {
		img.src='/images/minus.gif';
		img.alt='minus';
		document.getElementById(id).style.display="block";
	}
	else {
		img.src='/images/plus.gif';
		img.alt='plus';
		document.getElementById(id).style.display="none";
	}

}