function on_pl_a(n){
eval("document.getElementById('text_pl_a"+n+"').style.display='block';");
eval("document.getElementById('offtext_pl_a"+n+"').style.display='block';");
eval("document.getElementById('text_pl_b"+n+"').style.display='none';");
eval("document.getElementById('text_pl_c"+n+"').style.display='none';");
}
function on_pl_b(n){
eval("document.getElementById('text_pl_b"+n+"').style.display='block';");
eval("document.getElementById('offtext_pl_b"+n+"').style.display='block';");
eval("document.getElementById('text_pl_a"+n+"').style.display='none';");
eval("document.getElementById('text_pl_c"+n+"').style.display='none';");
}
function on_pl_c(n){
eval("document.getElementById('text_pl_c"+n+"').style.display='block';");
eval("document.getElementById('offtext_pl_c"+n+"').style.display='block';");
eval("document.getElementById('text_pl_a"+n+"').style.display='none';");
eval("document.getElementById('text_pl_b"+n+"').style.display='none';");
}
function off_pl(n){
eval("document.getElementById('text_pl_a"+n+"').style.display='none';");
eval("document.getElementById('text_pl_b"+n+"').style.display='none';");
eval("document.getElementById('text_pl_c"+n+"').style.display='none';");
eval("document.getElementById('offtext_pl_a"+n+"').style.display='none';");
eval("document.getElementById('offtext_pl_b"+n+"').style.display='none';");
eval("document.getElementById('offtext_pl_c"+n+"').style.display='none';");
}