HTML anchor ServerClick

[Jon Cosby]

I'm trying to find a simple script for hiding my email until the user
chooses to
send a message. I thought I might be able to do this with the ServerClick
event on
the HTML anchor, setting the valid url there. What happens is that some
JavaScript
code is added, and the url is replaced by call to a "__doPostBack"
function:
href="javascript:__doPostBack('MailBtn','')". All that happens when the link
is clicked
is a reload. What is this function? Somebody know a better way to do this (I
really
don't want to use a cumbersome form).

<script runat="server">
void EmailAnchor_Click(Object sender, EventArgs e)
{
MailLink.HRef = "mailto:[email protected]";
}
</script>

<a id="MailLink" href="mailto:[email protected]"
OnServerClick="EmailAnchor_Click" runat="server">