您可以为每个单元格的事件添加一个侦听器input,如果单元格包含多个数据项,则将它们拆分到下一个单元格中。
function init()
{
    var tables = document.getElementsByClassName("editabletable");
    var i;
    for (i = 0; i < tables.length; i++)
    {
        makeTableEditable(tables[i]);
    }
}
function makeTableEditable(table)
{
    var rows = table.rows;
    var r;
    for (r = 0; r < rows.length; r++)
    {
        var cols = rows[r].cells;
        var c;
        for (c = 0; c < cols.length; c++)
        {
            var cell = cols[c];
            var listener = makeEditListener(table, r, c);
            cell.addEventListener("input", listener, false);
        }
    }
}
function makeEditListener(table, row, col)
{
    return function(event)
    {
        var cell = getCellElement(table, row, col);
        var text = cell.innerHTML.replace(/<br>$/, '');
        var items = split(text);
        if (items.length === 1)
        {
            // Text is a single element, so do nothing.
            // Without this each keypress resets the focus.
            return;
        }
        var i;
        var r = row;
        var c = col;
        for (i = 0; i < items.length && r < table.rows.length; i++)
        {
            cell = getCellElement(table, r, c);
            cell.innerHTML = items[i]; // doesn't escape HTML
            c++;
            if (c === table.rows[r].cells.length)
            {
                r++;
                c = 0;
            }
        }
        cell.focus();
    };
}
function getCellElement(table, row, col)
{
    // assume each cell contains a div with the text
    return table.rows[row].cells[col].firstChild;
}
function split(str)
{
    // use comma and whitespace as delimiters
    return str.split(/,|\s|<br>/);
}
window.onload = init;
演示:http: //jsfiddle.net/yRnkF/