How to scroll to top of a div using jQuery?

I have a gridview inside a div.. I want to scroll to top of the div from the bottom of the div using jquery.. Any suggestion..

<div id="GridDiv">
// gridview inside..
</div>

My gridview will have custom pagination generated link buttons in it... I will scroll to top of the div from the bottom of the link button click ...

protected void Nav_OnClick(object sender, CommandEventArgs e)
    {
        LinkButton lb1 = (LinkButton)sender;
        //string s = lb1.ID;
        ScriptManager.RegisterClientScriptBlock(lb1, typeof(LinkButton), 
 "scroll", "javascript:document.getElementById('GridDiv').scrollTop = 0;", true);

In the place of javascript, I ll call the jquery function... Any suggestion...

EDIT:

Exactly like Stackoverflow questions per user page... When changing page nos it scrolls to top with smooth effect... I want to achieve that...

Here is what you can do using jquery:

$('#A_ID').click(function (e) { //#A_ID is an example. Use the id of your Anchor
    $('html, body').animate({
        scrollTop: $('#DIV_ID').offset().top - 20 //#DIV_ID is an example. Use the id of your destination on the page
    }, 'slow');
});

Or, for less code, inside your click you place:

setTimeout(function(){ 

$('#DIV_ID').scrollTop(0);

}, 500);

You could just use:

<div id="GridDiv">
// gridview inside...
</div>

<a href="#GridDiv">Scroll to top</a>