function border_bg(id) {
	document.getElementById('border_bg' + id).style.padding = '0px';
	var html = '<div class="t"><div class="r"><div class="b"><div class="l">';
	html += '<div class="tl"><div class="tr"><div class="bl"><div class="br">';
	html += document.getElementById('border_bg' + id).innerHTML;
	html += '</div></div></div></div></div></div></div></div>';
	document.getElementById('border_bg' + id).innerHTML = html;
}