function random_img(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
  myimages[1]="header_imgs/header.jpg"
  myimages[2]="header_imgs/header1.jpg"
  myimages[3]="header_imgs/header2.jpg"
  myimages[4]="header_imgs/header3.jpg"
  myimages[5]="header_imgs/header4.jpg"
  myimages[6]="header_imgs/header5.jpg"
  myimages[7]="header_imgs/header6.jpg"
  myimages[8]="header_imgs/header7.jpg"
  myimages[9]="header_imgs/header8.jpg"
  myimages[10]="header_imgs/header9.jpg"
  myimages[11]="header_imgs/header10.jpg"
  myimages[12]="header_imgs/header11.jpg"
  myimages[13]="header_imgs/header12.jpg"
  myimages[14]="header_imgs/header13.jpg"
  myimages[15]="header_imgs/header14.jpg"
  myimages[16]="header_imgs/header15.jpg"
  myimages[17]="header_imgs/header16.jpg"
  myimages[18]="header_imgs/header17.jpg"
  myimages[19]="header_imgs/header18.jpg"
  myimages[20]="header_imgs/header19.jpg"
  myimages[21]="header_imgs/header20.jpg"
  myimages[22]="header_imgs/header21.jpg"
  myimages[23]="header_imgs/header22.jpg"
  myimages[24]="header_imgs/header23.jpg"
  myimages[25]="header_imgs/header24.jpg"

  var ry=Math.floor(Math.random()*myimages.length)

  if (ry==0)
     ry=1
     document.write('<img src="'+myimages[ry]+'" + alt="Essex disc golf course picture" width=760px height=130px> ')
}
 random_img()