function changeImage() {

  var placeholder = document.getElementById("homephoto");
  	if(placeholder.getAttribute("src") == "images/photo-home.png"){
		placeholder.setAttribute("src","images/photo-home-02.png");
	} else
		if(placeholder.getAttribute("src") == "images/photo-home-02.png"){
		placeholder.setAttribute("src","images/photo-home-03.png");
	}  else
		if(placeholder.getAttribute("src") == "images/photo-home-03.png"){
		placeholder.setAttribute("src","images/photo-home-04.png");
	}  else
		if(placeholder.getAttribute("src") == "images/photo-home-04.png"){
		placeholder.setAttribute("src","images/photo-home-05.png");
	}  else
	{
		placeholder.setAttribute("src","images/photo-home.png");
	}


}