function externalLinks() { 
 if (!document.getElementsByTagName) return; 
 var anchors = document.getElementsByTagName("a"); 
 for (var i=0; i<anchors.length; i++) { 
   var anchor = anchors[i]; 
   if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") 
     anchor.target = "_blank"; 
 } 
} 

var interval = 6.0;  
interval *= 1000;
var aCustomerLogoArray = new Array();
var image_index = 0;
var number_of_image = 0; //Wordt aan het einde van elke pagina gevuld...

function generate(x, y) 
{
	var range = y - x + 1;
	return Math.floor(Math.random() * range) + x;
}

function getNextImage() 
{
	image_index = generate(0, number_of_image-1);
	var sNewImage = aCustomerLogoArray[image_index];
	return(sNewImage);
}

function rotateImage(sImageId) 
{
	var sNewImage = getNextImage();
	document.getElementById(sImageId).src = sNewImage;
	
	var recur_call = "rotateImage('"+sImageId+"')";
	setTimeout(recur_call, interval);
}