Error in jQuery with Ajax

I am using jquery Ajax following line of code having problem only with Firefox and Blackbarry browsers

postion:

navigator.geolocation.getCurrentPosition(currentPosition);

function currentPosition(res){
                window.res = res;
}

Code:

var postion = window.res;

    $.ajax({
          url: 'SendLocation',
          type: 'post', 
          data: position, // Position is navigator.geolocation.getCurrentPosition
          success: function(res){
                alert(res);
       }
    });

Error:

NS_ERROR_XPC_BAD_OP_ON_WN_PROTO: Illegal operation on WrappedNative prototype object

value = jQuery.isFunction( value ) ? value() : ( value == null ? "" : value );

After reading FormData Object not submitting via jQuery AJAX call post I added following line of code and code become processData: false, contentType: false,

Updated code:

$.ajax({
      url: 'SendLocation',
      type: 'post', 
      data: position, // Position is navigator.geolocation.getCurrentPosition
      processData: false,   //Added this line
      contentType: false,   //Added this line

      success: function(res){
            alert(res);
   }
});

with this no error was oucurring but code also stops working.