CSS div float IE and Firefox compatibility issues __div

In IE, only the class for which the DIV is specified is float:left with the float property

In the FF, the first specified div follows the translation, so you can add

. clear{Clear:both;} <div class= "Clear" ></DIV>

CSS in height:19px!important;  height:21px; In IE is not recognized important, if the property is repeated, the default interception of the last one. In the FF, the important is performed preferentially.

div settings Margin-left, IE will not center when Margin-right is auto, but FF can.