Here is the sample code :

$(document).ready(function(){ 
 $
("#cardetails").tap(function(event,ui){ 
 $
.ajax({ 
 url
:'http://wwwsampleurl.net/json/jsn_cmp.php?json=1&rcg_mobile=2&lan=en&callback=ajax_eup&pick_up_loc=AGPT01&drop_off_loc=AGPT01&country_des=ES&country_user=AE&currency=EUR&day_drop=Tue&day_pick=Tue&age_driver=30&uid=0&num_days=7&pick_up=2722&drop_off=2722&pick_up_day=13&pick_up_hour=10&pick_up_minute=00&pick_up_mon=08&pick_up_year=2013&drop_off_day=20&drop_off_hour=10&drop_off_minute=00&drop_off_mon=08&drop_off_year=2013', 
 data
:'', 
 contentType
: "application/json; 
 charset=utf-8"
, 
 type
: "POST", 
 dataType
: "json", 
 crossDomain
:true, 
 cache
: false, 
 async
:false, 
 success
: function(data, textStatus, jqXHR){ 
 $
.each(data, function(index, val) { 
 if
(index=='gen'){ 
 alert
("gen data - "+val.pick_up_day); 
 
} else if(index=='company_date'){
 //alert('Load cars')
 
 
for (var i = 0, len = val.length; i < len; i++) { 
 //alert(JSON.stringify(val[i])); 
 
 // alert(val[i].car_img);
 
 $
('#carImages').append('<img src="'+val[i].car_img+'" width="70" height="110" alt="'+val[i].car_group+'" title="'+val[i].type+'"/>');
  
} 
 
}
 
}); 
 
}, error: function(XMLHttpRequest, textStatus, errorThrown){
 
alert(textStatus +"-"+ errorThrown);
 }
 
 
}); 
 });