FYI - these Contact examples are for 0.9.3 and before.   
 Please see http://docs.phonegap.com/phonegap_contacts_contacts.md.html for 0.9.4 and beyond.


   function contactsCount(){
   debug.log("contactCount");
   navigator.contacts.contactsCount(onGotContactCount,onGotContactCountError);    
}
     
function onGotContactCount(num){
   document.getElementById("contactCountDiv").innerHTML = "Contact Count : " + num;
}
	
function onGotContactCountError(err){
   alert("error getting contacts :: " + err);
}