function ChangeImage( source, holder )
{

	var houder = document.getElementById('photo' + holder);
	
	// Create photo
		var photo = new Image();
		photo.src = source;
	
	// Get image width and height
		var img_w = photo.width;
		var img_h = photo.height;
		
	// Check if landscape photo or not
		if( img_w > img_h )
		{
			img_h = 225;
			img_w = 300;
		}
		
	// Create source
		var new_photo = '<img src="' + photo.src + '" title="Voorbeeld" border="0" width="' + img_w + '" height="' + img_h + '" onclick="LargeImage(this.src);" />';
		
	// Insert!
		houder.innerHTML = new_photo;

}

function LargeImage( image )
{
	
	// Get image size
	var afbeelding = new Image();
	afbeelding.src = image;
	
	var breedte = parseInt(afbeelding.width);
	var hoogte  = parseInt(afbeelding.height);
	
	var randomDigit = Math.random(9999999);
	// Open window
	OpenWindow( image, 'THO_Image_' + randomDigit, breedte, hoogte, 'center' );
	
}

function OpenWindow( url, name, w, h, pos )
{
	
	var win=null;
	
	if(pos=="random"){myleft=(screen.width)?Math.floor(Math.random()*(screen.width-w)):100;mytop=(screen.height)?Math.floor(Math.random()*((screen.height-h)-75)):100;}
	if(pos=="center"){myleft=(screen.width)?(screen.width-w)/2:100;mytop=(screen.height)?(screen.height-h)/2:100;}
	else if((pos!='center' && pos!="random") || pos==null){myleft=0;mytop=20}
	settings="width=" + w + ",height=" + h + ",top=" + mytop + ",left=" + myleft + ",scrollbars=no,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no";win=window.open(url,name,settings);
	win.focus();

}