var originalImage; 
var originalContent; 
function setOriginal(){ 
    originalImage = document.mainImage.src; 
    originalContent = document.getElementById("general-tekst").innerHTML; 
} 
function restoreContent(){ 
	document.mainImage.src = originalImage; 
	//document.getElementById("general-tekst").innerHTML = originalContent; 
} 
function updateContent(id){ 
	switch(id){ 
		case 0: 
			break; 

		case 1:
			document.mainImage.src = "../images/Gem_doesburg_1.jpg";
			break; 
	
		case 2:
			document.mainImage.src = "../images/Gem_doesburg_2.jpg";
			break; 
	
		case 3:
			document.mainImage.src = "../images/Gem_doesburg_3.jpg";
			break; 
	
		case 4:
			document.mainImage.src = "../images/Gem_doesburg_4.jpg";
			break; 
	
		case 5:
			document.mainImage.src = "../images/Gem_doesburg_6.jpg";
			break; 
	
		case 6:
			document.mainImage.src = "../images/Gem_doesburg_7.jpg";
			break; 
	
		case 7:
			document.mainImage.src = "../images/";
			break; 
	
		case 8:
			document.mainImage.src = "../images/";
			break; 
		}
}