function Answer ( act ) {
    // turn off the class name of any previously active links
    var Links = document.getElementsByTagName('li') ;
    for (i=0; i < Links.length ; i++) {
        if ( Links[i].id.substr(0,2) == 'L_' ) {
                document.getElementById( Links[i].id ).className = '';
        }
        if ( Links[i].id.substr(0,2) == 'R_' ) {
                document.getElementById( Links[i].id ).className = '';
        }
    }

    // push the text of the answer and question to the divs at the bottom of the window
    document.getElementById('_question').innerHTML = document.getElementById(act).firstChild.innerHTML ;
    document.getElementById('_answer').innerHTML = document.getElementById(act).lastChild.innerHTML ;

    // reset the style of the active question and clear any lingering display settings
    document.getElementById(act).blur() ;
    document.getElementById(act).className = 'activeQuestion' ;

    document.getElementById(act).focus() ; 
}