Rod Barbee's Backlight 2/3/4 test site

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Using this code in phplugins:

// Add class "current_page_item" to menu item for the current page; 
// You can style this as you like, for example, to highlight the current page menu item.
function scripts() { 
echo <<<SCRIPT
    <script>
    $("ul.menu a[href='" + window.location.pathname + "']")
        .parentsUntil('.menu', 'li')
        .addClass("current_page_item")
        ;
    </script>
SCRIPT;
    return false;
} // END 

And use this in your custom css file. Set colors to your preference:

/*current page menu highlighting */
.current_page_item {
    background-color: red !important;   
}
.current_page_item a {
    color: yellow !important;
}