function chpic(pic){
document.getElementById('container').innerHTML = '<img border=0 src=' + pic + '>';
}

function chpic2(pic2){
document.getElementById('container2').innerHTML = '<img border=0 src=' + pic2 + '>';
}

function chpic3(pic3){
document.getElementById('container3').innerHTML = '<img border=0 src=' + pic3 + '>';
}