function populateWebsiteExtension() {
  var textBoxCompanyName = document.getElementById('TextBoxCompanyName');

  if(textBoxCompanyName != null) {
    var companyName = textBoxCompanyName.value;
    companyName = companyName.toLowerCase();
    companyName = companyName.replace(/[ !@#$%/\^&*()+=<>\,?`~\""':;.]/g, "");
    document.all.TextBoxWebSiteExtension.value = companyName;
  }
}