兼容IE6的网页最小最大宽度和最小最大高度css写法

.min_width{
 min-width:300px;
 /*sets max-width for IE */
 _width:expression(document.body.clientWidth < 300 ? "300px" : "auto");
}

.max_width{
 max-width:600px;
 /*sets max-width for IE */
 _width:expression(document.body.clientWidth > 600 ? "600px" : "auto");
}

.min_height{
 min-height:200px;
 /* sets min-height for IE */
 _height:expression(this.scrollHeight < 200 ? "200px" : "auto");
}

.max_height{
 max-height:400px;
 /* sets max-height for IE */
 _height:expression(this.scrollHeight > 400 ? "400px" : "auto");
}

.min_and_max_width{
 min-width:300px;
 max-width:600px;
 /* sets min-width & max-width for IE */
 _width: expression(document.body.clientWidth < 300 ? "300px" :( document.body.clientWidth > 600 ? "600px" : "auto"));
}

.min_and_max_height{
 min-height:200px;
 max-height:400px;
 /* sets min-height & max-height for IE */
 _height: expression(this.scrollHeight < 200 ? "200px" :( this.scrollHeight > 400 ? "400px" : "auto"));
}