function on(n){
eval("document.getElementById('text"+n+"').style.display='block';");
eval("document.getElementById('ontext"+n+"').style.display='none';");
eval("document.getElementById('offtext"+n+"').style.display='block';");
}
function off(n){
eval("document.getElementById('text"+n+"').style.display='none';");
eval("document.getElementById('ontext"+n+"').style.display='block';");
eval("document.getElementById('offtext"+n+"').style.display='none';");
}