var currentImage = 1;
function changeBg()
{
	var bg = document.getElementById('bg');
	var repeat = document.getElementById('bgRepeat');
	currentImage++;
	if(currentImage>2)
		currentImage=1;

	bg.style.backgroundImage = 'url(images/header-'+currentImage+'.jpg)';
	repeat.style.backgroundImage = 'url(images/header-'+currentImage+'-repeat.jpg)';

	var header = document.getElementById('headerTitle');
	header.innerHTML = titles[currentImage-1];
}


setInterval('changeBg();', 7*1000);