.wrap{overflow:auto;_height:1%;} 

.gainlayout{display:inline-block;}
.gainlayout{display:block;}

.fl {float:left;}
.fr {float:right;}

.crL {clear: left;}
.crR {clear: right;}
.crB {clear: both;}

.b {font-weight:bolder;}

.HackBox {border-top:1px solid transparent !important;border-top:0;clear: both;}
.inline{display: inline;}

* html div.box1,* html div.box2{height: 150px;}
div.box1,div.box2{ ......height: 150px;}
/* IE靠这保持最小高度，超出就自动向下延伸 */
div[class].box1,div[class].box2{height: auto;} 
/* 具有类选择符(class)属性的DIV对象 */ div.box1,div.box2{ ......height: 150px;}
/* IE靠这保持最小高度，超出就自动向下延伸 */
div[class].box1,div[class].box2{height: auto;} 
/* 具有类选择符(class)属性的DIV对象 */