//Back button that works in NS, IE, and Opera.

function Back()
 {

   if (navigator.appName == "Microsoft Internet Explorer")
     document.location="javascript: history.go(-1)"
   else
     document.location="javascript: window.back()"
 }

document.write('<form><table align=center border=0 width=25%><tr><td align=center>')
document.write('<input type=button value=" Back " onClick="Back()"></td>')
document.write('</tr></table></form>')