//image rotation created on March 22, 2006 
function image_Rotate()
{
 num1=imgArray1.length;
 incr1=Math.floor(Math.random()*num1);
 document.open();
 document.write("<div  id=\"columnlink\" style=\"background-image:url(/files/structure/" + imgArray1[incr1] + ")\"> <a class=\"screenRead\" href=\"#columnbody\">Jump over the site\"s left-side navigation bar.</a> <!--#include virtual=\"/files/navigation/navigation_left.html\"--></div> "); 
document.close();
}