var picdir = "http://hezelstraatnijmegen.nl/wp-content/images/winkelstraat/";
	var picnr = 1;
	var i = 1;
	var pictures = 55;

	var aWalk = 1;
	var aWalkInterval = 1000; // milliseconden
function Init() {
				
	document.getElementById('tour_pic').src = picdir + i + "a.jpg";
				
	}
	function Kijkrichting(dir) {

	switch (dir) {
	case "a":
	document.getElementById('tour_pic').src = picdir + i + "a.jpg";
	break;
	case "b":
	document.getElementById('tour_pic').src = picdir + i + "b.jpg";
	break;
	case "c":
	document.getElementById('tour_pic').src = picdir + i + "c.jpg";
	break;
	case "d":
	document.getElementById('tour_pic').src = picdir + i + "d.jpg";
	break;
	}
}

function Lopen(dir) {

		switch (dir) {
		case "a":
		if (i < pictures) { 
		i++;
		document.getElementById('tour_pic').src = picdir + i + "a.jpg";
		}
		break;

		case "c":
		if (i > 1) { 
		i--;
		document.getElementById('tour_pic').src = picdir + i + "c.jpg";
		}
	break;
	}
}

function autoWalk(mode) {
				
	aWalk = mode;

	if (aWalk == 1) { 
		autoWalkTimer();
		document.getElementById("layaWalk").innerHTML = "<a onclick='javascript:autoWalk(0)'>Automatisch verloop uitzetten</a>";
	}
	else {		
		aWalk = 0;
		document.getElementById("layaWalk").innerHTML = "<a onclick='javascript:autoWalk(1)'>Automatisch verloop aanzetten</a>";
	}
}

function autoWalkTimer() {
		if (i < pictures && aWalk == 1) {
		Lopen('a');	
		window.setTimeout("autoWalkTimer()",aWalkInterval);
	}
}