var ScreenShotNum = 1;

function ShowNextScreenShot() {
	var ScreenShot = document.getElementById("ScreenShot" + ScreenShotNum);
	ScreenShot.style.display = "none";
	ScreenShotNum = ScreenShotNum + 1;
	if (ScreenShotNum > 3) {ScreenShotNum = 1};
	var ScreenShot = document.getElementById("ScreenShot" + ScreenShotNum);
	ScreenShot.style.display = "block";	
	
}