function change1(){
document.getElementById("mapHolder").className = "mapOne";
}

function change2(){
document.getElementById("mapHolder").className = "mapTwo";
}

function change3(){
document.getElementById("mapHolder").className = "mapThree";
}

function change4(){
document.getElementById("mapHolder").className = "mapFour";
}

function change5(){
document.getElementById("mapHolder").className = "mapFive";
}

function change6(){
document.getElementById("mapHolder").className = "mapSix";
}

function change7(){
document.getElementById("mapHolder").className = "mapSeven";
}

function change_back(){
document.getElementById("mapHolder").className = "mapWorld";
}