function closePlashka(){
var pl=document.getElementById("plashka_vishki");
pl.style.display="none";
var pl_o=document.getElementById("plashka_control_open");
pl_o.style.display="block";
}
function showPlashka(){
var pl=document.getElementById("plashka_vishki");
pl.style.display="block";
var pl_o=document.getElementById("plashka_control_open");
pl_o.style.display="none";
}