//This function redirects an HTML form page to itself after stripping the sample_input=1 part from the url
function resetclicked()
{
  var oldurl = self.location.href;
  var sampleindex = oldurl.indexOf('sample_input');
  var newurl = oldurl.substring(0, sampleindex) + oldurl.substring(sampleindex+14);
  self.location.href = newurl;
}