//
// iWeb - iWebImage.js
// Copyright 2007-2008 Apple Inc.
// All rights reserved.
//

var IWAllImages={};var IWAllImageObjects={};function IWCreateImage(url)
{return IWAllImages[url]||new IWImage(url);}
var IWNamedImages={};function IWImageNamed(name)
{var url=IWNamedImages[name];return url?IWCreateImage(url):null}
function IWRegisterNamedImage(name,url)
{IWNamedImages[name]=url;}
var IWImageEnableUnload=isiPhone;var IWImage=Class.create({initialize:function(url)
{if(IWAllImages.hasOwnProperty(url))
{iWLog("warning -- use IWCreateImage rather than new IWImage and you'll get better performance");}
this.mPreventUnloading=0;this.mLoading=false;this.mLoaded=false;this.mURL=url;this.mCallbacks=[];IWAllImages[url]=this;},sourceURL:function()
{return this.mURL;},loaded:function()
{return this.mLoaded;},load:function(callback,delayCallbackIfLoaded)
{if(this.mLoaded&&(callback!=null))
{delayCallbackIfLoaded?setTimeout(callback,0):callback();}
else
{if(callback!=null)
{this.mCallbacks.push(callback);}
if(this.mLoading==false)
{this.mLoading=true;var img=new Image();IWAllImageObjects[this.sourceURL()]=img;img.onload=this.p_onload.bind(this);img.src=this.mURL;}}},unload:function(evenIfNotEnabled)
{if((evenIfNotEnabled||IWImageEnableUnload)&&this.mLoaded)
{if(this.mPreventUnloading<=0)
{this.mLoaded=false;this.mLoading=false;IWAllImageObjects[this.sourceURL