function convert_H2V(input_num) {
   var x, new_num;

   if(input_num <= 'ff')
    {
      x = parseInt(input_num, 16);
      new_num = x/255;
    }
   return(new_num);
 }

 function convert (form) {
   form.VRMLred.value = convert_H2V(form.red.value)
   form.VRMLgreen.value = convert_H2V(form.green.value)
   form.VRMLblue.value = convert_H2V(form.blue.value)

 }