Determine if the request header contains a property to determine if it is an AJAX request

Source: Internet
Author: User
Tags http request

  This article describes how to determine whether the request header contains a property to determine whether the AJAX request, such as the following

The code is as follows: <html>  <head>  <script language= "javascript" >    function cl ()   {& nbsp var xmlhttp;    if (window. XMLHttpRequest)   {  xmlhttp=new XMLHttpRequest (); }  else  {  xmlhttp=new-ActiveXObject ("Microsoft.XMLHTTP"); }      Xmlhttp.open ("POST", "ajax2.html", True);  Xmlhttp.setrequestheader ("Content-type", "application/x-www-form-urlencoded"); //jquery Yui will send a containing http_x_ by default Requested_with HTTP request Header message, so it is possible to determine whether an AJAX request   Xmlhttp.setrequestheader (' Http_x_requested_ With ', ' Http_x_requested_with ');  xmlhttp.send ();    xmlhttp.onreadystatechange=function ()   {   if (xmlhttp.readystate==4 && xmlhttp.status==200)   {  alert (xmlhttp.responsetext); }  } }    </script>  </head>  <body>  <input type= "button" id= BT "Name=" BT "value=" OK "onclick=" cl (); "/>  </body>  </html>   
Related Article

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.