var current_side = ""; current_image = "";
function side_swapper(side,def_content) {
var default_side = def_content;
if (current_side==""){
	if (default_side){
		document.getElementById(default_side).style.visibility = "hidden";
		}
	document.getElementById(side).style.visibility = "visible";
	current_side = side;
	}
else if (side=="none"){
	document.getElementById(current_side).style.visibility = "hidden";
	current_side = ""
	}
else {
	document.getElementById(current_side).style.visibility = "hidden";
	document.getElementById(side).style.visibility = "visible";
	current_side = side;
	}
}

function image_swapper(image) {
if (current_image==""){
	document.getElementById(image).style.visibility = "visible";
	current_image = image;
	}
else if (side=="none"){
	document.getElementById(current_side).style.visibility = "hidden";
	current_side = ""
	}	
else {
	document.getElementById(current_image).style.visibility = "hidden";
	document.getElementById(image).style.visibility = "visible";
	current_image = image;
	}
}