Freeze table header with CSS first rows are under header

Question

I have been able to freeze my table headers and have the widths of the headers and the rest of the rows match up, but I am not able to get my first two rows to show out from under the header.

table {
    font-family:Arial, Helvetica, sans-serif;
    color:#666;
    font-size:12px;
    background:#eaebec;
    border:#ccc 1px solid;
    border-radius:3px;
    border-collapse:collapse;
    border-spacing: 0;
    box-shadow: 0 1px 2px #d1d1d1;
}
table th {
    padding:2px 2px 2px 2px;
    border-top:0;
    border-bottom:1px solid #e0e0e0;
    border-left: 1px solid #e0e0e0;
    background: #ededed;
}
table th:first-child {
    text-align: left;
}
table tr:first-child th:first-child {
    border-top-left-radius:3px;
    border-left: 0;
}
table tr:first-child th:last-child {
    border-top-right-radius:3px;
}
table tr {
    text-align: center;
}
table td:first-child {
    text-align: left;
    border-left: 0;
}
table td {
    padding:2px 2px 2px 2px;
    border-top:0;
    border-bottom:1px solid #e0e0e0;
    border-left: 1px solid #e0e0e0;
    white-space: nowrap;
}
table tr:last-child td {
    border-bottom:0;
}
table tr:last-child td:first-child {
    border-bottom-left-radius:3px;
}
table tr:last-child td:last-child {
    border-bottom-right-radius:3px;
}
table tr:hover td {
    background: #F7FE2E;
}
table th,
table td {
    width: 65px;
}
table tr,
table td {
    width: 65px;
    min-width: 65px;
}
#wrapper {
    width: auto;
    height: 850px;
    overflow-x: scroll;
    overflow-y: scroll;
}
thead {
    position: fixed;
}
tbody {
    position: relative;
}

So can someone point me in the right direction on how to move the first two rows out from under the header? Let me know if I need to explain more or if I need to add on to my question!

I have added a few things I think I didn't explain http://jsfiddle.net/FyJwZ/4/

Answer 1

Here is a jsFiddle in working order: http://jsfiddle.net/FyJwZ/7/

These are the changes I made

/* this is what will do the trick */
tbody {
    display: block;
    padding-top: 21px;
}

thead {
    z-index: 1; /* put on top of other rows */
}

thead tr td {
    background: #ddd;
}

/* only using !important to override your styles below */
td {
    margin-left: 0 !important;
    width: 100px !important;
}

UPDATE

Here is a more complete example: http://jsfiddle.net/kzuwR/14/