/*
 *    DIV SWAPPING FUNCTIONS
 *
 * 		Pages using these:
 *		- Behind the glass
 */


function swapdiv(olddiv,newdiv) {
 	if (olddiv == newdiv) { return olddiv; }
	hidediv(olddiv);
	showdiv(newdiv); 
	return newdiv;
}


function showdiv(div) {
//alert('Showing '+div);
	if ((getIdProperty(div, 'display') == 'block') 
		&& 
		(getIdProperty(div, 'visibility') == 'visible')) {
		return;		
	} else {
	 	setIdProperty(div, 'display', 'block');
	 	setIdProperty(div, 'visibility', 'visible');
	}		
//alert(div+' visibility property: '+getIdProperty(div, 'visibility'));
	return div;
}

function hidediv(div) {
//alert('Hiding '+div);
	if ((getIdProperty(div, 'display') == 'none')
		&& 
		(getIdProperty(div, 'visibility') == 'hidden')) {
		return;
	} else {
	 	setIdProperty(div, 'display', 'none');
	 	setIdProperty(div, 'visibility', 'hidden');
	}
	return div;
}