Logorithmic slider function

gistfile1.js

// Thanks to STH - http://stackoverflow.com/users/56338/sth

function logslider(value) {
  // value will be between 0 and 100
  var min = 0;
  var max = 100;

  // The result should be between 100 an 10000000
  var minv = Math.log(100);
  var maxv = Math.log(10000000);

  // calculate adjustment factor
  var scale = (maxv-minv) / (max-min);

  return Math.exp(minv + scale*(value-min));
}