function isEmail(elm) 
{
    if (elm.value.indexOf("@") == "-1" ||
        elm.value.indexOf(".") == "-1" ||
        elm.value == "")
    return true;
    else return false;
}

function checkData() 
{
		if (document.form.name.value.length == 0) 
	{
	alert("Please enter your name.");
	document.form.name.focus();
	return false;
	}
		
		if (document.form.address.value.length == 0) 
	{
	alert("Please enter your address");
	document.form.address.focus();
	return false;
	}
 	
		if (document.form.city.value.length == 0) 
	{
	alert("Please enter your city or town.");
	document.form.city.focus();
	return false;
	}
	
		if (document.form.state.value.length == 0) 
	{
	alert("Please enter your state or province.");
	document.form.state.focus();
	return false;
	}
	
		if (document.form.zipcode.value.length == 0) 
	{
	alert("Please enter your zip or postal code.");
	document.form.zipcode.focus();
	return false;
	}
	
	  	if (document.form.phone.value.length == 0) 
  	{
	alert("Please enter your phone number.");
	document.form.phone.focus();
	return false;
	}
	
		if (isEmail(document.form.email) == true) 
	{
   	alert("Please enter a valid eMail address.");
	document.form.email.focus();
  	return false;
  	}

return true;
}