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

/* Set image URLs */
my_imgs[0] = "../images/headers/HeaderGraphic1.jpg";
my_imgs[1] = "../images/headers/HeaderGraphic2.jpg";
my_imgs[2] = "../images/headers/HeaderGraphic3.jpg";
my_imgs[3] = "../images/headers/HeaderGraphic4.jpg";
my_imgs[4] = "../images/headers/HeaderGraphic5.jpg";
my_imgs[5] = "../images/headers/HeaderGraphic6.jpg";
my_imgs[6] = "../images/headers/HeaderGraphic7.jpg";
my_imgs[7] = "../images/headers/HeaderGraphic8.jpg";
my_imgs[8] = "../images/headers/HeaderGraphic9.jpg";
my_imgs[9] = "../images/headers/HeaderGraphic10.jpg";
my_imgs[10] = "../images/headers/HeaderGraphic11.jpg";

/* Set image link URLs */
my_imgs_link[0] = "../index.html";
my_imgs_link[1] = "../index.html";
my_imgs_link[2] = "../index.html";
my_imgs_link[3] = "../index.html";
my_imgs_link[4] = "../index.html";
my_imgs_link[5] = "../index.html";
my_imgs_link[6] = "../index.html";
my_imgs_link[7] = "../index.html";
my_imgs_link[8] = "../index.html";
my_imgs_link[9] = "../index.html";
my_imgs_link[10] = "../index.html";

/* Set image alternate text */
my_imgs_alt[0] = "Union Bridge";
my_imgs_alt[1] = "Taneytown";
my_imgs_alt[2] = "Walkersville";
my_imgs_alt[3] = "Myersville";
my_imgs_alt[4] = "Catoctin Furnace";
my_imgs_alt[5] = "Loy's Station Covered bridge, Thurmont";
my_imgs_alt[6] = "Mount Airy";
my_imgs_alt[7] = "Thurmont";
my_imgs_alt[8] = "Gambrill St Prk Middletown Overlook";
my_imgs_alt[9] = "Middleburg";
my_imgs_alt[10] = "Detour";

if (document.getElementById && document.createTextNode) {
 
  var the_div = document.getElementById("my_banners");
  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;
  
}