m1 = new Image();
			m1.src = "/darr.gif";
			m11 = new Image();
			m11.src = "/uarr.gif";

function show(obj) {
	if (document.getElementById(obj).style.display == 'none')
		{ document.getElementById(obj).style.display = 'block'; document.a1.src=m11.src; }
	else 
		{ document.getElementById(obj).style.display = 'none'; document.a1.src=m1.src; }
}