function DoFrames(URL1,F1,URL2,F2,URL3,F3,URL4,F4)
 {
 if (URL1!=''){
  parent.frames[F1].location.href=URL1;
  }
 if (URL2!=''){
  parent.frames[F2].location.href=URL2;
  }
 if (URL3!=''){
  parent.frames[F3].location.href=URL3;
  }
 if (URL4!=''){
  parent.frames[F4].location.href=URL4;
  }
 }