// Additional JS functions for DCD

function MM_swapImgRestore() 
{
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("http://www.lincolnharbor.net#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}




// OBJECT AND STYLE CONTROLS

// Get a reference to an object
function getObj(id) 
{
    //alert (id);
    if (document.getElementById) {return document.getElementById(id);}
    else if (document.all)       {return document.all[id];}
    else         {return false;}
}


// Get a reference to the style definition of an object
function getStyleObj(id) 
{
   // alert (id);
    if (document.getElementById) {return getObj(id).style;} 
    else {return getObj(id);}
}


function display_set (item, val) 
{
    //alert ("setting display of " + item + " to " + val);
    var el  = getStyleObj(item); 
    el.display = val;
}


function layer_set (item, val) 
{
    //alert ("setting layer of " + item + " to " + val);
    var el  = getStyleObj(item); 
    el.zIndex = val;
}



// Chiclet controls
var layer_max=20000;

function show_chiclet(item)
{
    layer_max++;
    layer_set(item, layer_max);
}


// COOKIE CONTROLS FOR RANDOMLY-SELECTED HOME PAGE IMAGES

// Set cookie
function cookie_set (name, value)
{
    var path = "/";
    
    // Set the cookie
    document.cookie = name + "=" + escape (value) + "; path=" + path;
}


// Get a random number between lo and hi that is different from the current value
function rand_val(lo, hi, current_val)
{
    do {rand_num = Math.round(Math.random(1)*10);}
    while (rand_num < lo || rand_num > hi || rand_num == current_val);
    
    return rand_num
}


// Set the value of the cookie
function cookie_val(val, image_max)
{
    // Set a cookie different that the current cookie
    this_cookie_01_val = rand_val(1, image_max, val)        
    
    cookie_set("this_cookie_01", this_cookie_01_val)
}


// The following cookie functions are used to control the intro image
// Check for session cookie
function cookie_get(name) 
{ 
    // Check for cookie 
    var index = document.cookie.indexOf(name + "=");
        if (index == -1) return null;

    // Extract the cookie
    index = document.cookie.indexOf("=", index) + 1;
    var endstr = document.cookie.indexOf(";", index);
    if (endstr == -1) endstr = document.cookie.length;
    return unescape(document.cookie.substring(index, endstr));
}

// Set the cookie
function cookie_init(image_max)
{
    // Declare a cookie var
    this_cookie_01_val = cookie_get("this_cookie_01");
    
    // Set the document.cookie to cookie var
    cookie_val(this_cookie_01_val, image_max);  

    // Set the img_rand var to a new value
    random_seed = this_cookie_01_val;
    
}

function reveal_home_promo(random_seed, object_prefix)
{
    // To reveal a home promo, you set display to block
    display_set (object_prefix + random_seed, "block");
    
}