javascript - 請教個問題，這裡的這個1怎麼擷取呀

            var counter = xmlHttp.responseXML.getElementsByTagName("count")[0].firstChild.data;

回複內容：

            var counter = xmlHttp.responseXML.getElementsByTagName("count")[0].firstChild.data;

function startCallback(){                if(xmlHttp.readyState == 4){                    if(xmlHttp.status == 200){                        setTimeout("pollServer()",5000);                        refreshTime();                    }                }            }                        function pollServer(){                var url = "DynamicUpdateServlet.php?task=foo" + counter();                createXMLHttpRequest();                xmlHttp.open("GET",url,true);                xmlHttp.onreadystatechange = pollCallback;                xmlHttp.send(null);            }                        function counter(){                var res = "&counter=";                var count = xmlHttp.responseXML.getElementsByTagName("count")[0].firstChild.data;                res += count;                return res;            }                        

pollServer() 中調用counter() 要放到 createXMLHttpRequest();前面

可以通過使用PHP的XMLReader內建類擷取

http://www.jb51.net/article/80437.htm

兩種方法 一：解析XML 二：正則匹配

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