function t_ob(obj_id){return document.getElementById(obj_id);}
function show_o(id){t_ob(id).style.display = 'block';}
function hid_o(id){t_ob(id).style.display = 'none';}
function sh_o(id){if (t_ob(id).style.display == 'none') show_o(id); else hid_o(id);}

function checkit(box){
	box = t_ob(box);
	if (box && box.checked){
		if (box.type != 'radio') box.checked = false;
	}else{
		box.checked = true;
	}
	box.focus();
}

function new_win(url, w, h){
	if (!w) w = 715;
	if (!h) h = 650;
	n_w = open(url,'n_w', 'menubar=0, scrollbars=yes, resizable=yes, width='+w+', height='+h);
	n_w.window.focus();
}