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Javascript Ajax code for retrieving information

Source: Internet
Author: User
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Client Code As follows: Copy code The Code is as follows: <HTML>
<Head>
<Script language = "JavaScript"> <! --
Function getit (){
If (document. getelementbyid ("url"). value = ""){
Alert ("Enter URL! ");
Return false;
}
If (document. getelementbyid ("count"). value = ""){
Alert ("Enter count! ");
Return false;
}
If (document. getelementbyid ("num"). value = ""){
Alert ("Enter num! ");
Return false;
}
If (document. getelementbyid ("end"). value = ""){
Alert ("Enter end! ");
Return false;
}
VaR url = Document. getelementbyid ("url"). value;
VaR COUNT = Document. getelementbyid ("count"). value;
VaR num = Document. getelementbyid ("num"). value;
VaR end = Document. getelementbyid ("end"). value;
Sendcall (URL, Count, num, end );
}
Function sendcall (URL, Count, num, end ){
If (parseint (Num) >=parseint (end) {return false ;}
VaR nurl = URL + "? Count = "+ Count +" & num = "+ num;
// Alert (nurl );
// Window. Open (nurl );
VaR XMLHTTP;
If (window. activexobject ){
XMLHTTP = new activexobject ("Microsoft. XMLHTTP ");
} Else if (window. XMLHttpRequest ){
XMLHTTP = new XMLHttpRequest ();
// Solve the cross-origin problem in FF
Try {
Netscape. Security. privilegemanager. enableprivilege ("universalbrowserread ");
} Catch (e ){
Alert ("permission universalbrowserread denied .");
}
}

XMLHTTP. onreadystatechange = function () {
If (XMLHTTP. readystate = 4 & XMLHTTP. status = 200) {
var STR = XMLHTTP. responsetext;
var MSG = document. getelementbyid ("getmsg");
If (Str. match (/thereisnothing/) {
MSG. innerhtml = "data has been transferred! "
}else {
// MSG. innerhtml = STR;
write (STR, Count, num);
var next = parseint (Num) + parseint (count);
sendcall (URL, count, next, end);
}< BR >}

XMLHTTP. Open ('post', nurl, true );
// XMLHTTP. setRequestHeader ("Content-Type", "text/XML ");
// XMLHTTP. setRequestHeader ("charset", "UTF-8 ");
XMLHTTP. Send (null );
}
Function write (STR, Count, num ){
VaR FSO = new activexobject ("scripting. FileSystemObject ");
VaR end = parseint (Num) + parseint (count );
VaR name = "E: \" + num + "-" + end + ". txt ";
VaR A = FSO. createtextfile (name, true );
A. writeline (STR );
A. Close ();
// Alert ("I have generated a" + name + "file under the root directory of your e disk! ");
Document. getelementbyid ("num"). value = end;
VaR MSG = Document. getelementbyid ("getmsg ");
MSG. innerhtml = "I have generated a" + name + "file under the root directory of your e disk! ";
}
// -->
</SCRIPT>
</Head>
<Body>

<Div>
Enter the setup then get the info:
</Div>

<Input id = "url" value = "http://www.oldjun.com/test.asp" size = "50">
<Input type = button value = "start" onclick = "javascript: getit ();"> <br>
<Div id = "getmsg">
</Div>

<Br>
→ How exactly once: <input name = "count" id = "count" type = "text" value = "1000" size = "30"/> <br>
→ Begin num: <input name = "num" id = "num" type = "text" value = "0" size = "30"/> <br>
→ End num: <input name = "end" id = "end" type = "text" value = "100" size = "30"/> <br>
</Body>

The function can be improved to prevent the interruption caused by failed access to information due to network congestion. It can be improved to implement many functional tools, such as ticket swiping... I only provide ideas for myself ~

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
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