function Form_Validator(theForm){
	if (theForm.txtUsername.value == ""){
		alert("Please enter your username");
		theForm.txtUsername.focus();
		return (false);
	}
	if (theForm.txtEmail.value == ""){
    	alert("Please enter a value for the \"email\" field.");
    	theForm.txtEmail.focus();
    	return (false);
 	}
	if (!isEmailAddr(theForm.txtEmail.value)){
	    alert("Please enter an email address in the form: name@domain.com");
		theForm.txtEmail.focus();
		return (false);
	}
  	if (theForm.txtEmail.value.length < 3){
		alert("Please enter at least 3 characters in the \"email\" field.");
		theForm.txtEmail.focus();
		return (false);
	}
		
	return true;
} 

function isEmailAddr(email)
{
  var result = false
  var theStr = new String(email)
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}