// 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.
// ********************************
// application-specific functions *
// ********************************

// store variables to control where the popup will appear relative to the cursor position
// positive numbers are below and to the right of the cursor, negative numbers are above and to the left
var xOffset = 30;
var yOffset = -5;

function showPopup (targetObjectId, eventObj, HelpId) { 
    document.getElementById('help_popup').innerHTML = '';
    document.getElementById('help_popup').innerHTML = help_arr[HelpId];
    

    if(eventObj) {
    // hide any currently-visible popups
    hideCurrentPopup();
    // stop event from bubbling up any farther
    eventObj.cancelBubble = true;
    // move popup div to current cursor position 
    // (add scrollTop to account for scrolling for IE)
    var newXCoordinate = (eventObj.pageX)?eventObj.pageX + xOffset:eventObj.x + xOffset + ((document.body.scrollLeft)?document.body.scrollLeft:0);
    var newYCoordinate = (eventObj.pageY)?eventObj.pageY + yOffset:eventObj.y + yOffset + ((document.body.scrollTop)?document.body.scrollTop:0);
    moveObject(targetObjectId, newXCoordinate, newYCoordinate);
    // and make it visible
    if( changeObjectVisibility(targetObjectId, 'visible') ) {
        // if we successfully showed the popup
        // store its Id on a globally-accessible object
        window.currentlyVisiblePopup = targetObjectId;
        return true;
    } else {
        // we couldn't show the popup, boo hoo!
        return false;
    }
    } else {
    // there was no event object, so we won't be able to position anything, so give up
    return false;
    }
} // showPopup

function hideCurrentPopup() {
    // note: we've stored the currently-visible popup on the global object window.currentlyVisiblePopup
    if(window.currentlyVisiblePopup) {
    changeObjectVisibility(window.currentlyVisiblePopup, 'hidden');
    window.currentlyVisiblePopup = false;
    }
} // hideCurrentPopup



// ***********************
// hacks and workarounds *
// ***********************

// initialize hacks whenever the page loads
window.onload = function run(){initializeHacks();showMem();}

// setup an event handler to hide popups for generic clicks on the document
document.onclick = hideCurrentPopup;

function initializeHacks() {
    // this ugly little hack resizes a blank div to make sure you can click
    // anywhere in the window for Mac MSIE 5
    if ((navigator.appVersion.indexOf('MSIE 5') != -1) 
    && (navigator.platform.indexOf('Mac') != -1)
    && getStyleObject('blankDiv')) {
    window.onresize = explorerMacResizeFix;
    }
    resizeBlankDiv();
    // this next function creates a placeholder object for older browsers
    // createFakeEventObj();
}

function createFakeEventObj() {
    // create a fake event object for older browsers to avoid errors in function call
    // when we need to pass the event object to functions
    if (!window.event) {
    window.event = false;
    }
} // createFakeEventObj

function resizeBlankDiv() {
    // resize blank placeholder div so IE 5 on mac will get all clicks in window
    if ((navigator.appVersion.indexOf('MSIE 5') != -1) 
    && (navigator.platform.indexOf('Mac') != -1)
    && getStyleObject('blankDiv')) {
    getStyleObject('blankDiv').width = document.body.clientWidth - 20;
    getStyleObject('blankDiv').height = document.body.clientHeight - 20;
    }
}

function explorerMacResizeFix () {
    location.reload(false);
}

// 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 + 'px';
    styleObject.top = newYCoordinate + 'px';
    return true;
    } else {
    // we couldn't find the object, so we can't very well move it
    return false;
    }
} // moveObject