var aryImages = Array('HeaderClamshell.jpg', 'HeaderHighTemp.jpg', 'HeaderIndustrial.jpg', 'HeaderNStamp.jpg', 'HeaderPress.jpg', 'HeaderReactor.jpg');
var imageFolder = 'images/Headers/';
var count = 0;
var iLastItem = 0;

//imageHolder.src = imageFolder + aryImages[0];

function ImageRotate() {

    var img = document.getElementById('imageHolder');
    
    while (count == iLastItem)
    {
        count = Math.floor(Math.random() * 6);
    }
    
    img.src = imageFolder + aryImages[count];
    iLastItem = count;
    
    window.setTimeout('ImageRotate()', 15000);
    //alert(img.src);
    
}

ImageRotate();