//show & hide comment
function show_txt(id){
if(document.all || document.getElementById){
if(document.all){
document.all(id).style.display = "block";
}else if(document.getElementById){
document.getElementById(id).style.display = "block";
}
}
}

function hide_txt(id){
if(document.all || document.getElementById){
if(document.all){
document.all(id).style.display = "none";
}else if(document.getElementById){
document.getElementById(id).style.display = "none";
}
}
}