function validateSubscribeForm(theForm){
	
	if (theForm.sender_lname.value==""){
		alert("Please enter your surname.");
		theForm.sender_lname.focus();
		return(false);
	}
	if (theForm.sender_address1.value==""){
		alert("Please enter your street address.");
		theForm.sender_address1.focus();
		return(false);
	}
	Ctrl = theForm.sender_email;
	if (theForm.sender_email.value==""){
	alert("Please enter your email address.");
	theForm.sender_email.focus();
	return(false);
	}
	else if (Ctrl.value==" " || Ctrl.value.indexOf ('@',0) == -1)
	{
	alert("Please enter a valid email address.");
	theForm.sender_email.focus();
	return(false);
	}
	else if (Ctrl.value==" " || Ctrl.value.indexOf ('.',0) == -1){
	alert("Please enter a valid email address.");
	theForm.sender_email.focus();
	return(false);
	}	return(true);
	}