function show0() {
 if(document.getElementById)
   document.getElementById("layer0").style.visibility = "visible";
   document.getElementById("layer0").style.display = "block";
}

function disappear0() {
 if(document.getElementById)
   document.getElementById("layer0").style.visibility = "hidden";
   document.getElementById("layer0").style.display = "none";
}

function show1() {
 if(document.getElementById)
   document.getElementById("layer1").style.visibility = "visible";
   document.getElementById("layer1").style.display = "block";
}

function disappear1() {
 if(document.getElementById)
   document.getElementById("layer1").style.visibility = "hidden";
   document.getElementById("layer1").style.display = "none";
}

function show2() {
 if(document.getElementById)
   document.getElementById("layer2").style.visibility = "visible";
   document.getElementById("layer2").style.display = "block";
}

function disappear2() {
 if(document.getElementById)
   document.getElementById("layer2").style.visibility = "hidden";
   document.getElementById("layer2").style.display = "none";
}

function show3() {
 if(document.getElementById)
   document.getElementById("layer3").style.visibility = "visible";
   document.getElementById("layer3").style.display = "block";
}

function disappear3() {
 if(document.getElementById)
   document.getElementById("layer3").style.visibility = "hidden";
   document.getElementById("layer3").style.display = "none";
}

function show4() {
 if(document.getElementById)
   document.getElementById("layer4").style.visibility = "visible";
   document.getElementById("layer4").style.display = "block";
}

function disappear4() {
 if(document.getElementById)
   document.getElementById("layer4").style.visibility = "hidden";
   document.getElementById("layer4").style.display = "none";
}

function show5() {
 if(document.getElementById)
   document.getElementById("layer5").style.visibility = "visible";
   document.getElementById("layer5").style.display = "block";
}

function disappear5() {
 if(document.getElementById)
   document.getElementById("layer5").style.visibility = "hidden";
   document.getElementById("layer5").style.display = "none";
}

function show6() {
 if(document.getElementById)
   document.getElementById("layer6").style.visibility = "visible";
   document.getElementById("layer6").style.display = "block";
}

function disappear6() {
 if(document.getElementById)
   document.getElementById("layer6").style.visibility = "hidden";
   document.getElementById("layer6").style.display = "none";
}