body {
}
.image1 {max-width: 450px;max-height:440px;} /* for Firefox & IE7 */ 

.image2 {max-width: 350px;max-height: 320px;} /* for Firefox & IE7 */ 
.image3 {max-width: 100px;max-height: 100px;} /* for Firefox & IE7 */ 

*html .image1{  /* for IE6 */ 

width:expression(this.width>450&&this.width>this.height?450:auto); 

height:expression(this.height>440?440:auto); 

}
*html .image2{ /* for IE6 */ 

width:expression(this.width>350&&this.width>this.height?350:auto); 

height:expression(this.height>320?320:auto); 



}
*html .image3{ /* for IE6 */ 

width:expression(this.width>100&&this.width>this.height?100:auto); 

height:expression(this.height>100?100:auto); 



}