hover this + after and this (n+1) and before

Question

jsfiddle.net/rqJAY/

HTML:

<table class="table_database_edit">
<tr><td>Magazyn wycieraczek</td><td>Edytuj</td><td>Usuń</td></tr>
<tr class="more" id=""><td colspan="3">aa</td></tr>
<tr><td>test</td><td>Edytuj</td><td>Usuń</td></tr>
<tr class="more" id=""><td colspan="3">aa</td></tr>
</table>

CSS:

tr.more{
    #display: none;
}
table.table_database_edit{
    width: 100%;
    border-collapse:collapse;
    border-spacing: 0;
}
table.table_database_edit  tr:nth-child(4n+3), table.table_database_edit  tr:nth-child(4n+4){
    background-color: #EFF0F1;
}
table.table_database_edit  tr:hover:nth-child(n) + tr:nth-child(n):after{
    background-color: #FFFFCC;
}
table.table_database_edit  tr:hover:nth-child(n+1) + tr:nth-child(n+1):before{
    background-color: #FFFFCC;
}

I have table. Every two rows is a group. The groups alternate background color. Rows 1 and 2 are white. Rows 3 and 4 are gray. Rows 5 and 6 are white. Etc.

I want to set the background-color to yellow when you hover over a group. How I can do it?

Answer 1

What you're looking for is tbody. The tbody element is similar to colgroup, but used for grouping rows. From there, the CSS is simple:

<table class="table_database_edit">
    <tbody>
        <tr><td>Magazyn wycieraczek</td><td>Edytuj</td><td>Usuń</td></tr>
        <tr class="more" id=""><td colspan="3">aa</td></tr>
    </tbody>

    <tbody>
        <tr><td>test</td><td>Edytuj</td><td>Usuń</td></tr>
        <tr class="more" id=""><td colspan="3">aa</td></tr>
    </tbody>
</table>

CSS:

tr.more{
    #display: none;
}
table.table_database_edit{
    width: 100%;
    border-collapse:collapse;
    border-spacing: 0;
}
table.table_database_edit  tbody:nth-child(odd) tr {
    background-color: #EFF0F1;
}

table.table_database_edit  tbody:hover tr {
    background-color: #FFFFCC;
}

http://jsfiddle.net/rqJAY/13/