var MsgWin;
	
	function sendMessage(id){
	    if (MsgWin && !MsgWin.closed) {MsgWin.close();}		 
		if(!id){return false;}
		if(isNaN(id)) {
			alert('Invalid address - please report this link');
			return false;
		}
		var url  = 'http://www.nutritech.co.nz/message.php?id=' + id;
		MsgWin = self.open(url,'msg','width=420,height=420,status=0,location=0,scrollbars,resizable');
	}