function random_imglink(){
  var myimages=new Array()
  //specify random images below. You can have as many as you wish
    myimages[1]="e-banner/Current Technologies to Increase the Transdermal Delivery of Drugs.gif"
	myimages[2]="e-banner/Frontiers in Drug Design & Discovery Volume 1.gif"
	myimages[3]="e-banner/Frontiers in Drug Design & Discovery Volume 2.gif"
	myimages[4]="e-banner/Frontiers in Drug Design & Discovery Volume 3.gif"
	myimages[5]="e-banner/Frontiers in Drug Design & Discovery Volume 4.gif"
	myimages[6]="e-banner/Frontiers in Medicinal Chemistry Volume 1.gif"
	myimages[7]="e-banner/Frontiers in Medicinal Chemistry Volume 2.gif"
	myimages[8]="e-banner/Frontiers in Medicinal Chemistry Volume 3.gif"
	myimages[9]="e-banner/Frontiers in Medicinal Chemistry Volume 4.gif"
	myimages[10]="e-banner/Frontiers in Medicinal Chemistry Volume 5.gif"
	myimages[11]="e-banner/Frontiers in Drug Design & Discovery Volume 5 copy.gif"
	myimages[12]="e-banner/Biopolymers in Drug Delivery copy.gif"
	
	

  //specify corresponding links below
  var imagelinks=new Array()
    imagelinks[1]="http://benthamscience.com/ebooks/9781608051915/index.htm"
	imagelinks[2]="http://benthamscience.com/ebooks/9781608051991/index.htm"
	imagelinks[3]="http://benthamscience.com/ebooks/9781608052004/index.htm"
	imagelinks[4]="http://benthamscience.com/ebooks/9781608052011/index.htm"
	imagelinks[5]="http://benthamscience.com/ebooks/9781608052028/index.htm"
	imagelinks[6]="http://benthamscience.com/ebooks/9781608052042/index.htm"
	imagelinks[7]="http://benthamscience.com/ebooks/9781608052059/index.htm"
	imagelinks[8]="http://benthamscience.com/ebooks/9781608052066/index.htm"
	imagelinks[9]="http://benthamscience.com/ebooks/9781608052073/index.htm"
	imagelinks[10]="http://benthamscience.com/ebooks/9781608052080/index.htm"
	imagelinks[11]="http://benthamscience.com/ebooks/9781608052035/index.htm"
	imagelinks[12]="http://benthamscience.com/ebooks/9781608050789/index.htm"
	
	
	
  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()