function sear1() {
document.getElementById("nvg").style.display = "block";
};

function sear2() {
document.getElementById("nvg").style.display = "none";
};

function sear12() {
document.getElementById("nvg2").style.display = "block";
};

function sear22() {
document.getElementById("nvg2").style.display = "none";
};

function sear13() {
document.getElementById("nvg3").style.display = "block";
};

function sear23() {
document.getElementById("nvg3").style.display = "none";
};

function sear14() {
document.getElementById("nvg4").style.display = "block";
};

function sear24() {
document.getElementById("nvg4").style.display = "none";
};

function sear15() {
document.getElementById("nvg5").style.display = "block";
};

function sear25() {
document.getElementById("nvg5").style.display = "none";
};

function sear16() {
document.getElementById("nvg6").style.display = "block";
};

function sear26() {
document.getElementById("nvg6").style.display = "none";
};

function sear17() {
document.getElementById("nvg7").style.display = "block";
};

function sear27() {
document.getElementById("nvg7").style.display = "none";
};

function sear18() {
document.getElementById("nvg8").style.display = "block";
};

function sear28() {
document.getElementById("nvg8").style.display = "none";
};