Question : Get Current selected link - apply css

I have a master page with menu in the top as <li> tags (style as tabs) each one is a link to different page with same master page. I want to apply different css style when that link is selected and remove it when it is not selected. how can I do that? thanks!

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...... masterPage.....
<li ><a href="/Default.aspx" id="homeNav"><span>Home</span></a></li>
<li > <a href="/admin/Admin.aspx" id="adminNav"> <span>Admin </span></a> </li>  
...............

Question : Get Current selected link - apply css

Answer : Get Current selected link - apply css

here is one way you can try:

if (Request.Url.ToString().Contains("/docs/"))
{
docsTab.CssClass = "docs";
}

Question : Get Current selected link - apply css

Answer : Get Current selected link - apply css

here is one way you can try:if (Request.Url.ToString().Contains("/docs/")){ docsTab.CssClass = "docs"; }

here is one way you can try:

if (Request.Url.ToString().Contains("/docs/"))
{
docsTab.CssClass = "docs";
}