function show_progress(id) {
replace_html(id, '<img src="images/loading.gif" border="0" alt="Carregando..." />');
}

function show_progress2(id) {
replace_html(id, '<img src="images/loading2.gif" border="0" alt="Carregando..." />');
}


function replace_html(id, content) {
document.getElementById(id).innerHTML = content;
}