function showhide(id, imgopen, imgclose) {
	var tobj = document.getElementById(id);
	var img  = id+'_img';
	if (tobj.className == "hidden") {
		tobj.className = "visible";
		document[img].src = imgopen;
	} else {
		tobj.className = "hidden";
		document[img].src = imgclose;
	}
}

function clearLoginFields(field)
{
	field.value = "";

}