var my_imgs = new Array();
var my_imgs_link = new Array();
var my_imgs_alt = new Array();

/* Set image URLs */
my_imgs[0] = "images/promo.jpg";
my_imgs[1] = "images/banner01.jpg";
my_imgs[2] = "images/banner02.jpg";
my_imgs[3] = "images/banner03.jpg";


/* Set image link URLs */
my_imgs_link[0] = "http://www.lajetcenter.com";
my_imgs_link[1] = "http://www.lajetcenter.com";
my_imgs_link[2] = "http://www.lajetcenter.com";
my_imgs_link[3] = "http://www.lajetcenter.com";


/* Set image alternate text */
my_imgs_alt[0] = "Los Angeles Jet Center";
my_imgs_alt[1] = "Los Angeles Jet Center";
my_imgs_alt[2] = "Los Angeles Jet Center";
my_imgs_alt[3] = "Los Angeles Jet Center";


if (document.getElementById && document.createTextNode) {
 
  var the_div = document.getElementById("headerbox");
  var ran_num = Math.floor(Math.random()*(my_imgs.length));
  
  var the_HTML = "<a href=\""+my_imgs_link[ran_num]+"\">";
  the_HTML += "<img src=\""+my_imgs[ran_num]+"\" class=\"banner_imgs\" ";
  the_HTML += "alt=\""+my_imgs_alt[ran_num]+"\" /></a>";
  the_div.innerHTML = the_HTML;
  
}