strValue += "";      // Convert any digits to string
  if (! strValue) { strValue = "0"; }  // Convert empty string to 0

  // Set any non-numeric values to 0
  if (! strValue.match (/^\d+\.?$|\d+\.?\d*$|\d*\.?\d+$/)) { strValue = "0"; }

  // Add a leading 0 to any numbers starting with a decimal point
  if (strValue.match (/^\./)) { strValue = "0" + strValue; }