function ResourceManager(){var resourceManager=this;this.preloadedImages=new Array;window.preloadImage=ResourceManager_PreloadImage;window.getImage=ResourceManager_GetImage;window.getImageSrc=ResourceManager_GetImageSrc;window.swapImageSrc=ResourceManager_SwapImageSrc;return this;}
function ResourceManager_PreloadImage(url,width,height){if(!window.resourceManager.preloadedImages)window.resourceManager.preloadedImages=new Array;if(!window.resourceManager.preloadedImages[url]){var image=new Image(width,height);image.src=url;window.resourceManager.preloadedImages[url]=image;}
return window.resourceManager.preloadedImages[url];}
function ResourceManager_GetImage(url,width,height){return window.preloadImage(url,width,height);}
function ResourceManager_GetImageSrc(url){return window.getImage(url).src;}
function ResourceManager_SwapImageSrc(imgElem,url){if(imgElem&&imgElem.nodeType=='IMG'){imgElem.oldSrc=imgElem.src;imgElem.src=window.getImageSrc(url);}}
window.resourceManager=new ResourceManager();