function fclear(form)
  {
     form.mile.value = ""
     form.knot.value = ""
  }

  function mphcomp(obj)
  {
     obj.milefeet.value = (obj.mile.value*5280)/60
     obj.yardfeet.value = (obj.mile.value*1760)/60
     obj.milekilo.value = (obj.mile.value*1.609344)
     obj.mileknot.value = (obj.mile.value*0.86897624)
     obj.milemeter.value = (obj.mile.value*0.44704)
  }
  
  function knotcomp(obj)
  {
     obj.knotfeet.value = (obj.knot.value*101.26859143)
     obj.knotyard.value = (obj.knot.value*33.75619714)
     obj.knotkilo.value = (obj.knot.value*1.852)
     obj.knotmile.value = (obj.knot.value*1.15077945)
     obj.knotmeter.value = (obj.knot.value*0.51444444)

  }