<p>(function() {
var CheckingScriptObjectCommand = ASPx.CreateClass(null, {
 constructor: function(scriptName, markerObjectName) {
  this.scriptName = scriptName;
  this.markerObjectName = markerObjectName;
  this.isExisted = false;
 },
 Run: function() {
  var markerObj = this.GetMarkerObject();
  this.isExisted = !!markerObj;
  if(this.isExisted)
   markerObj.DXPatched = true;
 },
 GetErrorMessage: function() {
  return this.GetErrorMessageCore(true);
 },
 GetErrorMessageCore: function(isScriptRequired){
  var markerObj = this.GetMarkerObject();
  if(this.isExisted & markerObj && markerObj.DXPatched || !isScriptRequired && !markerObj)
   return null;
  if(isScriptRequired & !this.GetMarkerObject()){
   if(this.isExisted)
    return this.scriptName + " script was attached but has been overridden.";
   else
    return this.scriptName + " script was not attached.";
  }
  if(!this.isExisted)
   return this.scriptName + " script was attached after DevExpress scripts.";
  return this.scriptName + " script was attached multiple times and mixed up with DevExpress scripts.";
 },
 GetMarkerObject: function() {
  return ASPx.GetGlobalObject(this.markerObjectName);
 }
});
var PatchScriptCommand = ASPx.CreateClass(CheckingScriptObjectCommand, {
 constructor: function(scriptName, markerObjectName, patchMethod, required) {
  this.constructor.prototype.constructor.call(this, scriptName, markerObjectName);
  this.required = required;
  this.patchMethod = patchMethod;
 },
 Run: function() {
  CheckingScriptObjectCommand.prototype.Run.call(this);
  if(this.isExisted)
   this.patchMethod();
 },
 GetErrorMessage: function() {  
  return this.GetErrorMessageCore(this.required);
 }
});
var ExternalScriptProcessor = ASPx.CreateClass(null, {
 constructor: function() {
  this.commands = {};
 },
 Process: function(scriptName, markerObjectName, patchMethod, required) {
  var newCommand = this.CreateCommand(scriptName, markerObjectName, patchMethod, !!required);
  var oldCommand = this.commands[markerObjectName];
  if(oldCommand) {
   if(!oldCommand.patchMethod & !newCommand.patchMethod)
    newCommand = null;
   else if(newCommand.patchMethod & (!oldCommand.patchMethod || oldCommand.required))
    newCommand.required = true;
   else if(oldCommand.patchMethod & !newCommand.patchMethod) {
    oldCommand.required = true;
    newCommand = null;
   }
  }
  if(newCommand) {
   this.commands[markerObjectName] = newCommand;
   newCommand.Run();
  }
 },
 CreateCommand: function(scriptName, markerObjectName, patchMethod, required) {
  if(patchMethod)
   return new PatchScriptCommand(scriptName, markerObjectName, patchMethod, required);
  return new CheckingScriptObjectCommand(scriptName, markerObjectName);
 },
 ShowErrorMessages: function() {
  var messages = this.GetErrorMessages();
  var console = window.console;
  if(!messages.length || !console || !ASPx.IsFunction(console.error))
   return;
  for(var i = 0; i &lt; messages.length; i++) {
   console.error(messages[i]);
  }
  ASPx.ShowKBErrorMessage("Please check the correctness of script registration on the page. For details, see ", "T272309");
 },
 GetErrorMessages: function() {
  var messages = [];
  for (var key in this.commands) {
   if (this.commands.hasOwnProperty(key)) {
    var message = this.commands[key].GetErrorMessage();
    if (message)
     messages.push(message);
   }
  }
  return messages;
 }
});
ExternalScriptProcessor.Instance = null;
ExternalScriptProcessor.getInstance = function() {
 if(!ExternalScriptProcessor.Instance)
  ExternalScriptProcessor.Instance = new ExternalScriptProcessor();
 return ExternalScriptProcessor.Instance;
};
ASPx.ExternalScriptProcessor = ExternalScriptProcessor;
})();
 5c6z7</p>