Vertikal center i div

Umuligt at huske, men brugbart 🙂

/*Internet explorer 10*/
    display: -ms-flexbox;
    -ms-flex-pack: center;
    -ms-flex-align: center;
    /*Firefox*/
    display: -moz-box;
    -moz-box-pack: center;
    -moz-box-align: center;
    /*Safari, Opera and Chrome*/
    display: -webkit-box;
    -webkit-box-pack: center;
    -webkit-box-align: center;
    /*W3C*/
    display: box;
    box-pack: center;
    box-align: center;