function show_hide (id) {
	var el = document.getElementById(id);
	if (el.style.display == 'none') el.style.display = 'block'; else el.style.display = 'none';
}

function open_win ( addr, width, height, title )
			    {
			        r = window.open( addr, '', "width="+width+", height="+height+", location=0, menubar=0, resizable=0, scrollbars=1, status=0, titlebar=0, toolbar=0, screenX=100, left=100, screenY=30, top=60 ");
			    }