if (navigator.appName == "Netscape") {
ToLayer="document.layers['";
Scobka="']";
LayerTop = ".top";
LayerLeft = ".left";
}else{
ToLayer="document.all.item('";
Scobka="').style";
LayerLeft = ".pixelLeft";
LayerTop = ".pixelTop";
}
function hideLayer(NameLayer){
eval(ToLayer+NameLayer+Scobka+'.visibility="hidden"');
}

function showLayer(NameLayer){
eval(ToLayer+NameLayer+Scobka+'.visibility="visible"');
}