// JavaScript Document
<!--
function getStyleObject(objectId) 
{
    // cross-browser function to get an object's style object given its id
    if(document.getElementById && document.getElementById(objectId)) 
    {
		// W3C DOM
		return document.getElementById(objectId).style;
    } 
    else if (document.all && document.all(objectId)) 
    {
		// MSIE 4 DOM
		return document.all(objectId).style;
    } 
    else if (document.layers && document.layers[objectId]) 
    {
		// NN 4 DOM.. note: this won't find nested layers
		return document.layers[objectId];
    } 
    else 
    { return false; }
} // getStyleObject

function changeObjectVisibility(objectId, newVisibility) 
{
    // get a reference to the cross-browser style object and make sure the object exists
    var styleObject = getStyleObject(objectId);
    if(styleObject) 
    {
		styleObject.visibility = newVisibility;
		return true;
    }
    else 
    {
		// we couldn't find the object, so we can't change its visibility
		return false;
    }
} // changeObjectVisibility

function displayContent(sObjectID, sNewStyle)
{
	// get a reference to the cross-browser style object and make sure the object exists
	var styleObject = getStyleObject(sObjectID);
	if(styleObject) 
    {
		styleObject.display = sNewStyle;
		return true;
    }
    else 
    {
		// we couldn't find the object, so we can't change its display style
		alert('Missing Object !');
		return false;
    }
}
//-->