function checkForm (what) {
 
  if (document.getElementById("name").value=="") {
	alert("Please enter your First Name");
	return false;
	};
  if (document.getElementById("surname").value=="") {
	alert("Please enter your Surname");
	return false;
	};
  if (document.getElementById("username").value=="") {
	alert("Please enter your Username");
	return false;
	};
  if (document.getElementById("terracetalk-password").value=="") {
	alert("Please enter your Password");
	return false;
	};
    var str = what; // email string 
    var reg1 = /(@.*@)|(\.\.)|(@\.)|(\.@)|(^\.)/; // not valid 
    var reg2 = /^.+\@(\[?)[a-zA-Z0-9\-\.]+\.([a-zA-Z0-9]{2,4}|)(\]?)$/; // valid
    if (!reg1.test(str) && reg2.test(str)) // if syntax is valid 
   { 
        return true;   
   } 
    else 
   { 
        alert("You din't enter your E-mail address, or you entered it incorrectly"); // this is also optional 
        return false; 
   };
}