function showhide(id) {
	if (document.getElementById(id).style.display == "none") {
		document.getElementById(id).style.display = "block";
		document.getElementById("thumb-tray").style.display = "block";
		document.getElementById("header").style.backgroundImage = "url(/layout/header-bgr.png)";
		document.getElementById("navi").style.backgroundImage = "url(/layout/navi-bgr.png)";
		document.getElementById("logo").style.backgroundImage = "url(/layout/ssmr-logo.png)";
	} else {
		document.getElementById(id).style.display = "none";
		document.getElementById("thumb-tray").style.display = "none";
		document.getElementById("header").style.backgroundImage = "url(none)";
		document.getElementById("navi").style.backgroundImage = "url(none)";
		document.getElementById("logo").style.backgroundImage = "url(/layout/ssmr-logo-trans.png)";
	}
}