$(document).ready(function(){

	$(window).bind('load',function(){
	  var preload=[
		'/images/splash/buttons/railway-over.jpg',
		'/images/splash/buttons/instrumentation-over.jpg',
		'/images/splash/buttons/repairs-over.jpg'
	  ];
	  $(document.createElement('img')).bind('load',function(){
		if(preload[0])this.src=preload.shift();
	  }).trigger('load');
	});

	var strImgSRC='';

	$('#content .buttons img').hover(function(){
		strImgSRC=$(this).attr('src');

		$(this).attr('src',strImgSRC.replace('.jpg','-over.jpg'));
	},function(){
		$(this).attr('src',strImgSRC);
	});

});