function impressie(nr){
	
	if(nr == 1){
		
		document.getElementById("impressie_big").innerHTML = '<img src="../img/impressie_1_big.jpg" alt="herendewit" />';
		
	}
	
	if(nr == 2){
		
		document.getElementById("impressie_big").innerHTML = '<img src="../img/impressie_2_big.jpg" alt="herendewit" />';
		
	}
	
	if(nr == 3){
		
		document.getElementById("impressie_big").innerHTML = '<img src="../img/impressie_3_big.jpg" alt="herendewit" />';
		
	}
	
}