You can do it by server side as well client side
If you want it as a server side that try
Solution 1
And if you want to use by client side that you can set display property of a Div's Style using javascript like that.. :)
document.getElementById("DivID").style.display="none";
document.getElementById("DivID").style.display="";
or
document.getElementById("DivID").style.display="block";
Regards,
Nirav Prabtani