// Copyright © 2000 by Apple Computer, Inc., All Rights Reserved.

//

// You may incorporate this Apple sample code into your own code

// without restriction. This Apple sample code has been provided "AS IS"

// and the responsibility for its operation is yours. You may redistribute

// this code, but you are not permitted to redistribute it as

// "Apple sample code" after having made changes.

//

// ************************

// layer utility routines *

// ************************



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 moveObject(objectId, newXCoordinate, newYCoordinate) {

    // get a reference to the cross-browser style object and make sure the object exists

    var styleObject = getStyleObject(objectId);

    if(styleObject) {

	styleObject.left = newXCoordinate;

	styleObject.top = newYCoordinate;

	return true;

    } else {

	// we couldn't find the object, so we can't very well move it

	return false;

    }

} // moveObject



// JZ custom function to swap text. This needs fixin' for NS4

function changeText(objectId, newText) {

    if(document.getElementById && document.getElementById(objectId)) {

		document.getElementById(objectId).innerHTML = newText;

    } else if (document.all && document.all(objectId)) {

		document.all(objectId).innerHTML = newText;

    } else if (document.layers && document.layers[objectId]) {

		return document.layers[objectId].innerHTML = newText;

    } else {

	return false;

    }

}