// JavaScript for popup
var state = 'hidden';
function showhide(layer_ref) {
	if (state == 'visible') {
		state = 'hidden';
	} else {
		state = 'visible';
	}
	if (document.all) {
		eval( "document.all." + layer_ref + ".style.visibility = state");
		eval( "document.all.greyPage.style.visibility = state");
	}
	if (document.layers) {
		document.layers[layer_ref].visibility = state;
		document.layers["greyPage"].visibility = state;
	}
	if (document.getElementById && !document.all) {
		documentItem = document.getElementById(layer_ref);
		documentItem.style.visibility = state;

		greyWindow = document.getElementById("greyPage");
		greyWindow.style.visibility = state;
	}
}