Show/Hide div using jQuery

Jquery is very useful plugin while developing websites. Its well known now. I know , you all are thinking that why
I am posting such simple solution again? this is so simple. Right na,
I am thinking same as you before doing this and checking it on all browsers.
Lets do this,

I have a div by name 'divTest' with some controls which I want to be access in my code page .cs/.vb
for that I need to apply attribute as 'runat=server' , like this

<div id="divTest" runat="server">
-
-
</div>

now jQuery code to hide/ show this div
lets add some more stuff. I want to display div on checkbox checked event

then the jQuery function will be -

 function HideDiv() {
            var ckh = $('#chkTest').attr('checked');
            var row = $('#divTest');     

            if (ckh == true) {
                row.hide();
         
            }
            if (ckh == false) {
                row.show();
            }
            return true;
        }

and finally the checkbox to hide/show div

<asp:CheckBox ID="chkTest" runat="server" onclick="HideDiv();"/>

This is fine.but now the problem comes when we hide this div from my code (.cs/.vb)

I will put simple code

divTest.visible=false

but this is wrong. If you click on checkbox then this will not display your div.
so the solution is

I have to set style of this div like

to hide -  divTest.Style.Add("display", "none") or
to show -  divTest.Style.Add("display", "block")

thats it!!

Happy Programming!!