function chkFormular()
{

 if(document.Formular.firstname.value == "") {
   alert("No firstname provided. Please fill it in.");
   document.Formular.firstname.focus();
   return false;
  }
 if(document.Formular.surname.value == "") {
   alert("No surname provided. Please fill it in.");
   document.Formular.surname.focus();
   return false;
  }
 if(document.Formular.phone_w.value == "") {
   alert("Please be so kind and provide your work telephone number!");
   document.Formular.phone_w.focus();
   return false;
  }
 if(document.Formular.my_email.value == "") {
   alert("Please enter your email address!");
   document.Formular.my_email.focus();
   return false;
  }
 if(document.Formular.my_email.value.indexOf('@') == -1) {
   alert("Invalid email address! The @ sign is missing!");
   document.Formular.my_email.focus();
   return false;
  }
 if(document.Formular.my_email.value.indexOf('.') == -1) {
   alert("Invalid email address! There is a dot missing, pointing to an incorrect domain name!");
   document.Formular.my_email.focus();
   return false;
  }
  if(document.Formular.my_email.value.indexOf(' ') != -1) {
   alert("Invalid email address! There should be no spaces in the address.");
   document.Formular.my_email.focus();
   return false;
  }
 if(document.Formular.comments.value == "") {
   alert("No comments provided. You should really write _something_! :-)");
   document.Formular.comments.focus();
   return false;
  }


}