function showTip(div_id) {
	var left;
	var top;
	var vis = $(div_id).getStyle('display');
	var block = div_id.replace('-tip', '');
	var block_class = $(block).className;
	if (block_class.match('fourth')) {
		left = $(block).offsetLeft;
		top = $(block).offsetTop;
		left = left + 'px';
		top = top + 'px';
		if (vis != 'table') {
			$(div_id).setStyle({'left': left, 'top': top});
			$(div_id).addClassName('box-tip-left');
			new Effect.Appear($(div_id), {duration: .1});
		} else {
		}
	} else {
		left = $(block).offsetLeft + 150;
		top = $(block).offsetTop;
		left = left + 'px';
		top = top + 'px';
		if (vis != 'table') {
			$(div_id).setStyle({'left': left, 'top': top});
			new Effect.Appear($(div_id), {duration: .1});
		}
	}
}

function hideTip(div_id) {
	var block = div_id.replace('-tip', '');
	var block_class = $(block).className;
	new Effect.Fade($(div_id), {duration: .1});
}