Hiding a <td> depending on the Condition

Question

I have a table structure as given below:

 

<table>

<tr>

<td id="td1"> </td>

<td id="td2"> </td>

<td id="td3"> </td>

<td id="td4"> </td>

</tr> 

</table>

 

I am checking some condition like:

 

if(a==2 || check == true)

 

I want to hide the "td3" if any one condition satisfies.

 

My code is in c#.

 

Need solution (in C# code behind or Jquery or Javascript) as soon as possible.

 

Thanx.

 

Note: I have already tried

 

document.getelementbyId("td3").style("display"= "none"),

document.getelementbyId("td3").display.hide();

td3.Attributes.add("style", "display:none")