本文為大家介紹下如何判斷要求標頭中是否含有某屬性來判斷是否時ajax請求，具體樣本如下
代碼如下:<html> <head> <script language="javascript"> function cl() { 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預設會發送一個含有HTTP_X_REQUESTED_WITH的HTTP要求標頭訊息，因此，可以通過判斷要求標頭中是否含有該屬性來判斷是否時ajax請求 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>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
