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Javascript-CSS show and hide form elements

Using Javascript, how to show and hide some parts of the table (for example: TR or TD). This should work depending on the data retrieved from the database. I use CakePHP framework for my application and use one view file for adding and editing. In edit mode. Depending on the selected data, I need to show and hide some parts of the form elements.

Scenario There are five questions: A, B, C, D nad EB depends on A, C depends on B, D depends on C and E depends on D Therefore, adding that I have hidden B, C, D and E when choosing Related questions will display other questions. A, B, C, D - all are yes / no questions (switches).

For instance:

<'table>
<'tr id='a'>
  <'td colspan='2'>A<'/td>
<'/tr>  
<'tr id='b'>
  <'td colspan='2'>B<'/td>
<'/tr>
<'tr id='cd'>
  <'td id='c'>C<'/td><'td id='d'>D<'/td>
<'/tr>
<'/table>

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JavaScript display:

document.getElementById(id).style.display = "none";
document.getElementById(id).style.display = "block";

visibility:

document.getElementById(id).style.visibility= "hidden";
document.getElementById(id).style.visibility= "visible";

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var el = document.getElementById('a');
a.style.visibility = 'hidden';
a.style.visibility = 'visible';

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var el = document.getElementById('a');
a.style.display = 'none';
a.style.display = '';

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+2

jQuery: ("#b").css("display","none"); ("#b").css("display","block");

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+1

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