function valid_all(va) {	
	var bSend = false;
	if (document.contactform.firstname.value.length==0) {
		alert("Please enter your first name");
	    document.contactform.firstname.focus();
	    return false;
	}
	if (document.contactform.lastname.value.length==0) {
			alert("Please enter your last name");
	    	document.contactform.lastname.focus();
	    	return false;
	}	
	if (document.contactform.email.value.length==0) {
			alert("Please enter your email");
	    	document.contactform.email.focus();
	    	return false;
	}	
	if (document.contactform.comments.value.length==0) {
			alert("Please enter a message");
	    	document.contactform.comments.focus();
	    	return false;
	}		
    return true;
}