/*--------------------------------------------------
pop up
--------------------------------------------------*/

var currently_open = "";

function openPopup( elementId ) {
	hide( currently_open );
	show( elementId );
	currently_open = elementId;
}

function hide( elementId ) {
	var el = document.getElementById( elementId );
	if ( el ) {
		el.className = "popupBlockHide";
	}
}

function show( elementId ) {
	var el = document.getElementById( elementId );
	if ( el ) {
		el.className = "popupBlockShow";
	}
}