var visible_div = null;

function showDIV(divID) {
	var divElement;

	hideDIVs(divID);
	divElement = document.getElementById(divID);
	divElement.style.display = "block";
}

function hideDIVs(newdivID) {
	var hidedivElement;

	hidedivElement = document.getElementById(visible_div);
	hidedivElement.style.display = "none";
	visible_div = newdivID;
}