var curPhoto="5a1";
function changePhoto5() {
	if (curPhoto== "5a1") {
		document.photo.src = "Images/unit5a2.jpg";
		curPhoto = "5a2";
	}
	else if (curPhoto== "5a2") {
		document.photo.src = "Images/unit5a3.jpg";
		curPhoto = "5a3";
	}
	else if (curPhoto== "5a3") {
		
		document.photo.src = "Images/unit5b1.jpg";
		curPhoto = "5b1";
	}
	else if (curPhoto== "5b1") {
		document.photo.src = "Images/unit5b2.jpg";
		curPhoto = "5b2";
	}
	else if (curPhoto== "5b2") {
		document.photo.src = "Images/unit5b3.jpg";
		curPhoto = "5b3";
	}       
	else if (curPhoto== "5b3") {
		document.photo.src = "Images/unit5c.jpg";
		curPhoto = "5c";
	}
	else if (curPhoto== "5c") {
		
		document.photo.src = "Images/unit5d.jpg";
		curPhoto = "5d";
	}
	else if (curPhoto== "5d") {
		document.photo.src = "Images/unit5e.jpg";
		curPhoto = "5e";	
    } 
   else if (curPhoto== "5e") {
		document.photo.src = "Images/unit5f.jpg";
		curPhoto = "5f";
	}       
	else if (curPhoto== "5f") {
		document.photo.src = "Images/unit5g.jpg";
		curPhoto = "5g";
	}
	else if (curPhoto== "5g") {
		
		document.photo.src = "Images/unit5h.jpg";
		curPhoto = "5h";
	}
	else if (curPhoto== "5h") {
		document.photo.src = "Images/unit5i.jpg";
		curPhoto = "5i";	
    }
	else if (curPhoto== "5i") {
		document.photo.src = "Images/unit5a1.jpg";
		curPhoto = "5a1";	
    }                                          
}