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.address1.value.length==0) {
			alert("Please enter your address line 1");
	    	document.contactform.address1.focus();
	    	return false;
	}	
	if (document.contactform.address3.value.length==0) {
			alert("Please enter your town / city");
	    	document.contactform.address3.focus();
	    	return false;
	}		
	if (document.contactform.postcode.value.length==0) {
			alert("Please enter a postcode");
	    	document.contactform.postcode.focus();
	    	return false;
	}		
    return true;
}