var preloadedImages=new Array(new Image(),new Image());
var imageBasePath='/images/';
preloadedImages[0].src=imageBasePath+'fullscreen.png';
preloadedImages[1].src=imageBasePath+'fullscreen_over.png';

function overState(){
	document.getElementById('fullscreen_button').src=preloadedImages[1].src;
}

function outState(){
	document.getElementById('fullscreen_button').src=preloadedImages[0].src;
}