function form1_onsubmit()
{
  var form = document.form1;
  var returnValue = false;
  
  if (form.name.value == "")
  { 
     alert("Please fill in your name!");
     form.name.focus();
  }

    else if (form.country.value == "")
  {
     alert("Please fill in your nationality!");
     form.country.focus();  
  }
  
    else if (form.Tel.value == "")
  {
     alert("Please fill in your telephone number!");
     form.Tel.focus();  
  }
  
  else if (!validEmail(form.email,"Email",true))
	return false; 	
 
 else
  {
     returnValue = true;
  } 
 
  return returnValue;

}

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;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Please fill in your ' + fieldLabel +'');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Please fill in your email in the form of 'yourname@yourdomain.com'");
		formField.focus();
		result = false;
	}
   
  return result;

}