.alpha50 {filter: Alpha(Opacity=30,  Style=0, StartX=0, StartY=0, FinishX=67, FinishY=21);}

/* 這是標準 CSS 2.0 語法，可以限定最大寬度，即然有 max-width，那當然也就會有 min-width 囉！至於 max-height 使用方法當然也就相同囉 */
.thumbImage {max-width: 100px;max-height: 100px;}

/* IE6 */
* html .thumbImage {width: 100px;height: 100px;} 

/* IE7 */
*+ html .thumbImage {
width: expression(((this.width > 100) && (this.width > this.height)) ? "100px": "auto");
height: expression(((this.height > 100) && (this.height > this.width)) ? "100px": "auto");}