var isDHTML = 0;
var isLayers = 0;
var isAll = 0;
var isID = 0;

if (document.getElementById) {isID = 1; isDHTML = 1; }
else {
    if (document.all) {isAll = 1; isDHTML = 1;}
    else {
        browserVersion = parseInt(navigator.appVersion);
    if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {isLayers = 1; isDHTML = 1;}
}}
 
function findDOM(objectID,withStyle) {
if (withStyle == 1) {
    if (isID) { return (document.getElementById(objectID).style) ; }
    else {
      if (isAll) { return (document.all[objectID].style); }
	else {
      if (isLayers) { return (document.layers[objectID]); }
    };}
  }
  else {
    if (isID) { return (document.getElementById(objectID)) ; }
    else {
      if (isAll) { return (document.all[objectID]); }
    else {
      if (isLayers) { return (document.layers[objectID]); }
    };}
  }
} 

function setVisibilityJ(objectID,state)
{
	var dom = findDOM(objectID,1);
	dom.visibility = state;
}

function toggleVisibility(objectID)
{
  var dom = findDOM(objectID,1);
  state = dom.visiblity;
  if (state == 'hidden' || state == 'hide' )
	dom.visiblity = 'visible';
  else
  {
	if (state == 'visible' ||
		state == 'show')
			dom.visibility = 'hidden';
	else
		dom.visibility = 'visible';
	}
}


function HandleVisibility(nameoflayer,numoflayers,visible_layer)
{

	for (i=1;i <= numoflayers;i=i+1) 
	{
		if (visible_layer != i)
		{
			layername = nameoflayer + i;
			setVisibilityJ(layername,'hidden');
		}
	}
	layername = nameoflayer + visible_layer;
	setVisibilityJ(layername,'visible');
	
}