Ajax not completing

OK, , In using Jquery, many developers do large amounts of Jquery conditionals, and Jquery "Chained" methods, and do not take time to try and use less code, and check for inefficiencies, and redundant code phrases and methods. Ans some developers load so many javascript librarys , like three versions of Jquery, a version of MooTools, and several other javascript add on. . . . This can lead to what you call - "Tremendously flaky at times" javascript, seemingly working, and then a small change it seems not to work, or sometimes it works and sometimes it seems not to.

You may need to re evaluate the amount of javascript add-on, and the amount of javascript code work you have, and Reduce the unneeded "special" widgets, and redundant code processes, , in order to get an "efficient" and optimized and WORKING javascript functioning.

= = = = = = = = = = = = = = = =

you ask - "how should I handle it when the text I need to send includes an ampersand?
e.g.:  customer=AIR BERLIN PLC & CO LUFTVERKEHRS KG"

I tried to explain this to you, and I gave you an example as

var php_params = "job="+encodeURIComponent("SearchForm")+
"&task="+encodeURIComponent("PartialForm")+
"&tablename="+encodeURIComponent("Customer")+
"&uniq_field_value="+
encodeURIComponent(cust_name) ;

In further explain, Please Notice, that the necessary URI parameters of & and = are NOT in the encodeURIComponent( ), but just in the unaltered STRING portion as  +"&task="+

So you could build the URI string with -
+"&customer="+encodeURIComponent("AIR BERLIN PLC & CO LUFTVERKEHRS KG")+

Or using variables -

var cus = $('input [name=customer]').val( );
// cus above contains string "AIR BERLIN PLC & CO LUFTVERKEHRS KG"
if (!cus) {alert("customer is Empty, please fill it"); return;}

var tsk = $('#task').text( );

var prms = "tsk="+encodeURIComponent(tsk)+
"&cus="+encodeURIComponent(cus);

prms = {
      url: '/cmdb/PHP/do_FormSearch_query.php',
      method:     "GET" ,
      cache:      false ,
      data:       prms ,
      dataType:   'JSON'
      }

$aj = $.ajax(prms);

$aj.done(function(data) {
  if (data.error) {
  alert("Server ERROR: "+data.error+", because - "+data.factors);
  } else {
  alert("The Server Operation is complete for Customer: "+data.cusName);
  }

 })  ;

aj.fail(function(xhr, error1, err) {
  if (xhr.status==404) alert("ERROR from Ajax as '404 status' the "+prms.url+
  " page was NOT on Server, \nCan NOT recover from this ERROR, This operation is NOT available!");
  else {
    alert("Ajax ERROR = \""+error1+"\", with server Status: "+xhr.status+", post-URL: "+prms.url+
	", \npost-Data: "+prms.data+", \nerror because: "+err);
    if (aj.responseText) {
    console.log("Ajax ERROR response= "+aj.responseText); 
    }else console.log("Ajax Received Text is empty");
  }
  });

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