html, body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: transparent;
}

img {
    display: block;
    border: 0;
    margin: 0;
}

a img{
    border: 0;
}

table {
    border-collapse: collapse;
    margin: 0;
}

td, th {
    vertical-align: top;
    text-align: left;
    padding: 0;
}

.whf {
    width: 100%;
    height: 100%;
}

.wh {
    height: 100%; 
}

.wf {
    width: 100%;
}

.posrel {
    position: relative;
}

.tac {
    text-align: center;
}

.tal {
    text-align: left;
}

.tar {
    text-align: right;
}

.vam {
    vertical-align: middle;
}