how to center a table in html

<table style="border:1px solid black;margin-left:auto;margin-right:auto;">

table#yourTable {
    position: fixed;
    left: 50%;
    top: 50%;
    margin: -(H/2)px -(W/2)px;
    width: Wpx;
    height: Hpx;
}

.centerTable { margin: 0px auto; }

<table align="center">