function flip_div (member) { 
    if (document.getElementById) { 
        if (document.getElementById(member).style.display == "block") { 
            document.getElementById(member).style.display = "none"; 
        } else { 
            document.getElementById(member).style.display = "block"; 
        } 
    } 
} 

function hide_div (member) { 
    if (document.getElementById) { 
            document.getElementById(member).style.display = "none"; 
    } 
} 

function show_div (member) { 
    if (document.getElementById) { 
            document.getElementById(member).style.display = "block"; 
    } 
}