function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
  myimages[1]="e-banner/Riesz-Spaces.gif"
  myimages[2]="e-banner/Casebook.gif"
  myimages[3]="e-banner/Alternative Food-Preservation copy.gif"
  myimages[4]="e-banner/New Methods of Celestial Mechanics copy.gif"
  myimages[5]="e-banner/Progress in Computational Physics (PiCP) Volume 1 Wave Propagation in Periodic Media copy.gif"
  myimages[6]="e-banner/Solitary Waves in Fluid Media copy.gif"
  myimages[7]="e-banner/Some Recent Advances in Partial Difference Equations copy.gif"
  myimages[8]="e-banner/Spline-Interpolation Solution of One Elasticity Theory Problem copy.gif"
  //specify corresponding links below
  var imagelinks=new Array()
  imagelinks[1]="http://www.benthamscience.com/ebooks/9781608050031/index.htm"
  imagelinks[2]="http://www.benthamscience.com/ebooks/9781608050031/index.htm"
  imagelinks[3]="http://www.benthamscience.com/ebooks/9781608050963/index.htm"
  imagelinks[4]="http://www.benthamscience.com/ebooks/9781608051878/index.htm"
  imagelinks[5]="http://www.benthamscience.com/ebooks/9781608051502/index.htm"
  imagelinks[6]="http://www.benthamscience.com/ebooks/9781608051403/index.htm"
  imagelinks[7]="http://www.benthamscience.com/ebooks/9781608051526/index.htm"
  imagelinks[8]="http://www.benthamscience.com/ebooks/9781608052097/index.htm"
  //imagelinks[3]="http://www.java-scripts.net"

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

  if (ry==0)
     ry=1
     document.write('<a href='+'"'+imagelinks[ry]+'"'+' onclick="window.open(this.href); return false;"><img src="'+myimages[ry]+'" border=0></a>')
}

  random_imglink()