How to add cellspacing="0" if it's not available for any `<table>` using jquery?

Question

How to add cellspacing="0" if it's not available for any <table> using jquery?

and if it's available and it has any other value than ="0" then want to convert it to ="0"

Answer 1

$('table').attr("cellspacing", 0);

Will change every table's cellspacing attribute to 0, whether it was previously defined or not.

Starting HTML:

<table> ... </table>
<table cellspacing="5" cellpadding="5"> ... </table>

Resulting HTML:

<table cellspacing="0"> ... </table>
<table cellspacing="0" cellpadding="5"> ... </table>

Answer 2

 <table id="table_id" cellspacing="0px">
 .................

Try:

if ($('#table_id').attr('cellspacing')) // does attribute exit
{
  if ('0px' != $('#table_id').attr('cellspacing'))
  {
    $('#table_id').attr('cellspacing', '0px') // make its value 0
  }
}
else // attribute does not exist
{
  $('#table_id').attr('cellspacing', '10px') // add
}