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How does one call a JavaScript function from the AJAX code?

  •  Ajax is a form of JavaScript, which uses XML Http Request objects which pass action event parameters to a method named ''open''. 
  •  In AJAX we can't track the requests and responses in any order. 
  •  ''XMLHttpRequest.open'' is the function which uses action events as Parameters in URL. 
  •  While ''XMLHttp Request.send'' sends the Request object either synchronously or asynchronously which depend on whether the option for the synchronous version is true or false?