How to convert the following table to JSON with javascript?

Answer 1

Try this.

var myRows = { myRows: [] };

var $th = $('table th');
$('table tbody tr').each(function(i, tr){
    var obj = {}, $tds = $(tr).find('td');
    $th.each(function(index, th){
        obj[$(th).text()] = $tds.eq(index).text();
    });
    myRows.myRows.push(obj);
});
alert(JSON.stringify(myRows));

Working demo - http://jsfiddle.net/u7nKF/1/