if (document.images)
    {
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "images/headerimage_01.jpg";
      image_url[1] = "images/headerimage_02.jpg";
      image_url[2] = "images/headerimage_03.jpg";

       var i = 0;
       for(i=0; i<=3; i++) 
         preload_image_object.src = image_url[i];
    }    
  
var currentdate = 0
var core = 0

function StringArray (n) {
  this.length = n;
  for (var i =1; i <= n; i++) {
    this[i] = ' '

  }
}

image = new StringArray(3)
image[0] = 'headerimage_01.jpg'
image[1] = 'headerimage_02.jpg'
image[2] = 'headerimage_03.jpg'

var ran = 60/image.length

function ranimage1() {
  currentdate = new Date()
  core = currentdate.getSeconds()
  core = Math.floor(core/ran)
    return(image[core])
}

document.write("<img src='http://www.mikeyblackstar.com/images/" +ranimage1()+ "' title='Title Image'>")