Follow the below steps to parse JASON in PhoneGap.

Step 1. Call Js function From html page or from where we want, like this

function onBodyLoad()
{
document.addEventListener(deviceready, callJson, false);
}

Step 2. Create a function of name callJson and call parsing Function from it in js file.

function callJson() {

 var webUrl = url;
 //
check(webUrl);
}

Step 3.

function check(API) {
 alert(entered);
 var http_request = new XMLHttpRequest();
alert(http_request);
http_request.open(GET, API, false);
http_request.send(null);
var my_JSON_object = http_request.responseText;
//alert(my_JSON_object);
 var data = JSON.parse(my_JSON_object);
 alert(data.success);
if(data.success==true){
 //alert(data.Regions.Region.length);
 var html = ;

var _length=data.Regions.Region.length;    
for(var i=0; i<_length;i++){
var _resort=data.Regions.Region[i];
 var totalResorts=_resort.count;
var _resionDic={
 name:_resort.name,
 count:totalResorts
}
 html += <li>  <a href=# ></a>+_resort.name+'</li
 for(var j=0; j<totalResorts;j++){
 //alert(_resort.Resorts[j].resort_name);

var _resortDic={
 id:_resort.Resorts[j].id,
 name:_resort.Resorts[j].resort_name,
 country:_resort.Resorts[j].country,
 longitude:_resort.Resorts[j].longitude,   
 latitude:_resort.Resorts[j].latitude
 }

_resionDic[Resort+i]=_resortDic;


}
Resionlist.push(_resionDic);
 };
 var arr=Resionlist[0];
 var m=0;
 alert(arr[Resort+m].name);
 $(#Region).html(html);
$(#Region).listview(refresh);

 }
}