function change1() {
document.getElementById('optionImage1').style.visibility = "visible"; 
document.getElementById('optionImage2').style.visibility = "hidden"; 
document.getElementById('optionImage3').style.visibility = "hidden"; 
document.getElementById('optionImage4').style.visibility = "hidden";
document.getElementById('optionImage5').style.visibility = "hidden";
}
function change2() { 
document.getElementById('optionImage1').style.visibility = "hidden"; 
document.getElementById('optionImage2').style.visibility = "visible";
document.getElementById('optionImage3').style.visibility = "hidden"; 
document.getElementById('optionImage4').style.visibility = "hidden";
document.getElementById('optionImage5').style.visibility = "hidden";
}
function change3() {
document.getElementById('optionImage1').style.visibility = "hidden"; 
document.getElementById('optionImage2').style.visibility = "hidden"; 
document.getElementById('optionImage3').style.visibility = "visible"; 
document.getElementById('optionImage4').style.visibility = "hidden";
document.getElementById('optionImage5').style.visibility = "hidden";
}
function change4() {
document.getElementById('optionImage1').style.visibility = "hidden"; 
document.getElementById('optionImage2').style.visibility = "hidden"; 
document.getElementById('optionImage3').style.visibility = "hidden"; 
document.getElementById('optionImage4').style.visibility = "visible";
document.getElementById('optionImage5').style.visibility = "hidden";
}
function change5() {
document.getElementById('optionImage1').style.visibility = "hidden"; 
document.getElementById('optionImage2').style.visibility = "hidden"; 
document.getElementById('optionImage3').style.visibility = "hidden"; 
document.getElementById('optionImage4').style.visibility = "hidden";
document.getElementById('optionImage5').style.visibility = "visible";
}