ie6，图片等比例缩放

dd.body2_dd2_r a img {
	max-width: 112px;
	max-height: 92px;
	_height: expression(this.width >90? this.height*(90/this.width) :this.height);
	_width: expression(this.width >112?112:this.width);
	vertical-align: middle;
}