body,p,h1,h2,h3,h4,h5,h6,ul,dl,dd,input,form,select{
    margin: 0;
    padding: 0;
}

h1,h2,h3,h4,h5,h6{
    font-size: 100%;
}

ul{
    list-style: none;
}

a{
    text-decoration: none;
}

img{
    border: none;
}

em{
    font-style: normal;
}

.clearfix:before,.clearfix:after{
    content: "";
    display: table;
}

.clearfix:after{ /*父级不设置高度，子级全是浮动而撑不起父级框*/ 
    clear: both;
}

.clearfix{ /*IE*/
    zoom: 1;
}

.fl{
    float: left;
}

.fr{
    float: right;
}