function setVisible1( setting ){var myElement1 = document.getElementById("layer1");
if(setting)
        myElement1.style.visibility="visible";
else
        myElement1.style.visibility="hidden";
}

function setVisible2( setting ){var myElement2 = document.getElementById("layer2");
if(setting)
        myElement2.style.visibility="visible";
else
        myElement2.style.visibility="hidden";
}

function setVisible3( setting ){var myElement3 = document.getElementById("layer3");
if(setting)
        myElement3.style.visibility="visible";
else
        myElement3.style.visibility="hidden";
}

function setVisible4( setting ){var myElement4 = document.getElementById("layer4");
if(setting)
        myElement4.style.visibility="visible";
else
        myElement4.style.visibility="hidden";
}

function setVisible5( setting ){var myElement5 = document.getElementById("layer5");
if(setting)
        myElement5.style.visibility="visible";
else
        myElement5.style.visibility="hidden";
}




function setVisible7( setting ){var myElement7 = document.getElementById("layer7");
if(setting)
        myElement7.style.visibility="visible";
else
        myElement7.style.visibility="hidden";
}

function setVisible8( setting ){var myElement8 = document.getElementById("layer8");
if(setting)
        myElement8.style.visibility="visible";
else
        myElement8.style.visibility="hidden";
}

function setVisible9( setting ){var myElement9 = document.getElementById("layer9");
if(setting)
        myElement9.style.visibility="visible";
else
        myElement9.style.visibility="hidden";
}