CSS - Link not clickable when using absolute position

Question

Here is the HTML script of my header:

<div class="header">
<div class="logo"><a href="Default.aspx"><img src="style/images/logo.png" alt="" /></a></div>
<div class="toplink"><a href="Signin.aspx">Sign in</a></div>
<div class="search">
    <form class="searchform" runat="server" method="get">
        <input type="text" id="s" name="s" value="Search for photos" onFocus="this.value=''" onBlur="this.value='Search for photos'"/>
    </form>
</div>
</div>

And here is the CSS script:

.logo {
    padding: 30px 0;
}

.logo img {
    display: inline;
} 

.toplink {
    position: absolute;
    bottom: 40px;
    right: 280px;
    font-size: 14px;
}

.search {
    position: absolute;
    bottom: 10px;
    right: 0;
    font-size: 14px;
    width: 330px;
}

Somehow the Sign in link isn't clickable, but when I remove the absolute position, it works normally. Is there anyway to make the link work while still keeping the position? Any suggestion is appreciated, and thanks in advance.

-Edit- Turns out the problem lies somewhere else. Actually I'm using masterpage and I created a default ASP page using it. The problem only occurs when I test that ASP page, not the HTML file that I used to create the masterpage. Sorry if I sound complicated but yeah, the problem's sort of complicated to me. Hopefully someone can point out the reason for me.

Answer 1

Try adding z-index:10; to .toplink{...} class.