ASP.NET

this code works for me<br />
code behind<br />
===========<br />
private void Page_Load(object sender, System.EventArgs e)<br />
		{<br />
			// Put user code to initialize the page here<br />
			Button1.Attributes.Add("onclick","hide()");<br />
		}<br />
<br />
<br />
private void Button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			System.Threading.Thread.Sleep(5000);<br />
			Response.Write("posted");<br />
		}<br />
<br />
javascript<br />
==========<br />
function hide()<br />
    {<br />
    document.getElementById('Button1').style.visibility = 'hidden'<br />
        }