function on_kalk_a(n){
eval("document.getElementById('text_kalk"+n+"').style.display='block';");
eval("document.getElementById('offtext_kalk"+n+"').style.display='block';");
}
function on_kalk_b(n){
eval("document.getElementById('text_kalk"+n+"').style.display='block';");
eval("document.getElementById('offtext_kalk"+n+"').style.display='block';");
}
function on_kalk_с(n){
eval("document.getElementById('text_kalk"+n+"').style.display='block';");
eval("document.getElementById('offtext_kalk"+n+"').style.display='block';");
}
function off_kalk(n){
eval("document.getElementById('text_kalk"+n+"').style.display='none';");
eval("document.getElementById('offtext_kalk"+n+"').style.display='none';");
}