// show/hide text content div
function show(id)
{
    el = document.getElementById(id);
    el.style.display = '';
}

function hide(id)
{
    el = document.getElementById(id);
    el.style.display = 'none';
    
}

//make links (un)highlighted
function linkOn(id){
    document.getElementById(id).style.color = 'red';
}

function linkOff(id){
    document.getElementById(id).style.color = "#336699";
}

//simple popup opener
function openWin(theURL) {
    var winName = 'copperfin';
    var winleft = (screen.width - 650) / 2;
    var winUp = (screen.height - 530) / 2;
    features = 'width=650,height=530,left='+winleft+',top='+winUp+'';
    window.open(theURL,winName,features);
}