Shulou(Shulou.com)06/03 Report--

This article mainly introduces how js+AJAX asynchronously collects all videos and information from Youku albums, which has a certain reference value. Interested friends can refer to it. I hope you will gain a lot after reading this article. Let's take a look at it.

Code

JavaScipt AJAX & regular expression test

Function wrt (s) {

Subret.value = s + "\ n" + subret.value

/ / subret.value + = "\ n" + s

}

Var objRequest; / / define a XML request object

Var previd = "", nowid = 0pr listid = "", iscancel=false; / / other variables

Function getlid () {

Var listid = weburl.value.match (/ playlist_show\ /. * (? = id_ (\ d +)). *\ .html $/ I)

If (! listid) {

Return null

} else {

Return listid [1]

}

}

Function retweb () {

If (objRequest.readyState = = 4 & & objRequest.status = = 200) {

/ / get callback

Var webstr = objRequest.responseText

Vid = webstr.match (/ var\ s+videoId\ swords =\ s * "(\ d +)"\ s match /) [1]

Vtitle = webstr.match (/ (. +)-(. +)-Video-Youku Video-online viewing (-)? /) [2]

Wrt (nowid + ":" + vtitle + "=" + vid)

If (previd = = vid) return

Previd = vid

Nowid + = 1

/ / start a new cycle

If (iscancel) return

Tstart ()

} else {

/ / alert ("callback failed!")

Return;// "error:" + objRequest.statusText

}

}

Function getweb (u) {

ObjRequest = new XMLHttpRequest (); / / new ActiveXObject ("Msxml2.XMLHTTP"); / / IE5&6 initializes the XMLHTTP object

ObjRequest.onreadystatechange = retweb; / / Asynchronous callback method

ObjRequest.open ("GET", uJing true)

ObjRequest.send (null)

}

Function tstart () {

If (listid== "") {

Listid=getlid ()

}

Url = "http://v.youku.com/v_playlist/f" + listid +" o1p "+ nowid +" .html "

Getweb (url)

}

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