var capable = (document.getElementById && document.getElementsByTagName);
var ismoz = navigator.userAgent.indexOf("Gecko");
var isie = navigator.userAgent.indexOf("MSIE");

/* 
 * Functions to preload/swap images
 */


// MenuImage(image_id, normal_image, active_image, mouseover_image, image_swapped)
var MImages = new Array(
    new MenuImage('', '', '', '', 0)
    );


// MenuImage constructor
function MenuImage(img_id, img_out, img_in, img_act, swapped) 
{
    this.img_id = img_id;           // the image id
    this.img_out = new Image();     // the image to use when mouseout
    this.img_out.src = 'images/'+img_out;
    this.img_in = new Image();      // the image to use when mouseover
    this.img_in.src = 'images/'+img_in;
    this.img_act = new Image();     // the image when page active
    if(img_act) {
        this.img_act.src = 'images/'+img_act;
    } else {
        this.img_act.src = '';
    }    
    this.swapped = swapped;         // register if the image is swapped
    this.over = 0;                  // register if the image is 'over'
}

// take a full or partial path, and return it's last part
function basename(path) 
{
    var parts = path.split('/');
    return parts[parts.length-1];
}

// get an image from an image_id
function get_image(id)
{
    for(var a=0; a<=MImages.length; a++)
    {
        if(MImages[a].img_id == id)
            return a;
    }
}

// swap in the image
function imgIn(image_id)
{
    var imgId = get_image(image_id);

    if(capable && MImages[imgId]) 
    {
        var theObj = MImages[imgId];
        var theImg = document.getElementById(theObj.img_id);
        var filename = basename(theImg.src);

        // don't swap if image is 'down' or currently active 
        if(filename.indexOf('-on') == -1 && filename.indexOf('-over') == -1) 
        {
            theImg.src = MImages[imgId].img_in.src;
            MImages[imgId].swapped = 1;
        }
    }
}

// swap out the image
function imgOut(image_id) 
{
    var imgId = get_image(image_id);

    if(capable && MImages[imgId]) 
    {
        theImg = document.getElementById(MImages[imgId].img_id);
        // only revert if "swapped" is true
        if(MImages[imgId].swapped) 
        {
            theImg.src = MImages[imgId].img_out.src;
            MImages[imgId].swapped = 0;
        }
    }
}




/*
 * Functions to swap the background color of a div 
 */

var savedBG = new Array();

function changeBG(id, color)
{
    if(capable && id && color)
    {
        var objStyle = document.getElementById(id).style;
        savedBG[id] = objStyle.backgroundColor;
        objStyle.backgroundColor = "#"+color;
    }
}

function changeBackBG(id)
{
    if(capable && id && savedBG[id])
    {
        var objStyle = document.getElementById(id).style;
        objStyle.backgroundColor = savedBG[id];
        savedBG[id] = ""; 
    }
}


/*
 * Functions to open links in a new window
 */
var newwin='';

// open a popup window
function popWindow(theUrl,width,height,full) {
    // use defaults if width and height were not supplied
    var ismoz = navigator.userAgent.indexOf("Gecko");
    var isie = navigator.userAgent.indexOf("MSIE");
    var default_width = 600;
    var default_height = 450;
    var offset_width = (isie != -1) ? 4 : 0;
    var offset_height = (isie != -1) ? 45 : 0;
    var popType = (full) ? ",scrollbars=yes,resizable=yes,status=yes,toolbar=yes,menubar=yes,location=yes,directories=yes" : ",scrollbars=no,resizable=no,status=no";
    
    var popWidth = (width) ? width + offset_width : default_width + offset_width;
    var popHeight = (height) ? height + offset_height : default_height + offset_height;
    var popLeft = self.screen.availWidth/2 - popWidth/2;
    var popTop = self.screen.availHeight/2 - popHeight/2;
    
    if(theUrl) {
        if(newwin)
            newwin.close();
        newwin = window.open(theUrl,'newwin','left='+popLeft+',top='+popTop+',width='+popWidth+',height='+popHeight+popType);
    }

    return;
}

// To allow for programmer notes while coding
// MRC: Can be removed before launch
// jgp: We're using this on the site now, so don't remove it

function toggleLayer(whichLayer)
{
    if (capable)
    {
        var style2 = document.getElementById(whichLayer).style;
        style2.display = (style2.display == "block") ? "none" : "block";
    }
    // dropped support for non-standard DOM models
}

function faqClick(objDisable, objEnable) 
{
   disableLayers(objDisable);
   toggleLayer(objEnable);
}

function disableLayers(eName)
{
    if(capable)
    { 
        var eType = "div";
        var elements = getDomArray(eName, eType);
        
        for(var i=0; i<elements.length; i++)
        {
            // Some browsers identify elements differently, so we
            // need to check for elements of the object. 
            if(elements[i].style)
        {
                // alert("i is " + i);
                // alert("elements[1] is " + elements[i]);
                elements[i].style.display = "none";
            }
        }
    }
}


function getDomArray(id, element)
{
    if(capable)
    {
        var containerObj = document.getElementById(id);
        var objArray = containerObj.getElementsByTagName(element);
        return objArray;
    }
    else
    {
        return -1;
    }

}


// get a cookie's value
function getCookie(name)
{   
    var re = new RegExp(name + "=([^;]+)");
    var value = re.exec(document.cookie);
    return (value != null) ? unescape(value[1]) : null;
}

// set a cookie's name and value
function setCookie(name, value) 
{
    var today = new Date();
    var expiry = new Date(today.getTime() + 28 * 24 * 60 * 60 * 1000); // plus 28 days
    // no expiry = session cookie
    document.cookie = name + "=" + escape(value) + "; path=/;";// expires=" + expiry.toGMTString();
} 


// Choose a random selection from a list and save it in a cookie
function getRandMovie(cookieName, arrLength)
{
    var current = getCookie(cookieName);

    if( current != null )
    {
        return current;
    }
    else
    {
        current = Math.floor(Math.random() * arrLength);
        setCookie(cookieName, current);
        return current;
    }       

}


// Increment the movie if they've been here before.
// Otherwise, show the first one.
function getIncMovie(cookieName, arrLength)
{
    var current = getCookie(cookieName);
    if(current) {
        current++;
        if(current >= arrLength) {
            current = 0; 
        }
    } else {
        current = 0;
    }
    
    setCookie(cookieName, current);
    return current;
}



//
// How many flash images to rotate through

NumberOfFlashMoviesToRotate = 7;

// Specify the first and last part of the image tag.

FirstPart = '<img src="images/home/home-mid-';
LastPart = '.gif" width="364" height="58" alt="Meet Our Team" />';

function printImage() {
  var r = Math.ceil(Math.random() * NumberOfFlashMoviesToRotate);
  document.write(FirstPart + r + LastPart);
}

function hideImg(img)
{
    if (capable)
    {
        imgObj = document.getElementById(img);
        imgObj.style.display = "none";
    }
}

function showImg(img)
{
    if (capable)
    {
        imgObj = document.getElementById(img);
        imgObj.style.display = "inline";
    }
}