How to make hover on table cells with Javascript?

Question

I have my table with hover function on Rows, I am trying to change it to be hover on cells instead

Here's my current script:

<script type="text/javascript">
    window.onload=function(){
    var tfrow = document.getElementById('tfhover').rows.length;
    var tbRow=[];
    for (var i=1;i<tfrow;i++) {
        tbRow[i]=document.getElementById('tfhover').rows[i];
        tbRow[i].onmouseover = function(){
          this.style.backgroundColor = '#f3f8aa';
        };
        tbRow[i].onmouseout = function() {
          this.style.backgroundColor = '#ffffff';
        };
    }
};
</script>

And here what i tried to change so far but still not working:

<script type="text/javascript">
    window.onload=function(){
    var tfcell = document.getElementById('tfhover').cells.length;
    var tbCell=[];
    for (var i=1;i<tfcell;i++) {
        tbCell[i]=document.getElementById('tfhover').cells[i];
        tbCell[i].onmouseover = function(){
          this.style.backgroundColor = '#f3f8aa';
        };
        tbCell[i].onmouseout = function() {
          this.style.backgroundColor = '#ffffff';
        };
    }
};
</script>

How can i achieve hover on cell instead of hover on row with my script?

Answer 1

You can use regular CSS for this purpose:

#tfhover td {
    background-color: #fff;
}
#tfhover td:hover {
    background-color: #f3f8aa;
}

Thanks to @Mike Brant for pointing out the missing table id

Answer 2

To answer your question... which is how to do this with jQuery:

$('#tfhover td').hover(function() {
    $(this).css('background-color', '#fsf8aa');
}, function () {
    $(this).css('background-color', '#ffffff');
});

Of course your example has nothing to do with jQuery. It just reminds how much simpler these things become using jQuery.

Answer 3

Cells are in the list of row, as rows are in the list of table.

To get a cell, just document.getElementById('tfhover').rows[i].cells[j] .Both lists start from 0.

<script type="text/javascript">
    window.onload=function(){
    var tfrow = document.getElementById('tfhover').rows.length;
    var tbRow=[];
    for (var i=1;i<tfrow;i++) {
        tbRow[i]=document.getElementById('tfhover').rows[i];
        var tfcell=tbRow[i].cells.length;
        for(var j=0;j<tfcell;j++){
            var _tbCell=tbRow[i].cells[j];
            _tbCell.onmouseover=function(){
                this.style.backgroundColor = '#f3f8aa';
            }
            _tbCell.onmouseout=function(){
                this.style.backgroundColor = '#ffffff';
            }
        }
    }
};
</script>