Initialize the Ajax object initajax. js
/* Initialize an XMLHTTP object */
==========================================
Call page index. php
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<SCRIPT src = "initajax. js" type = "text/JavaScript"> </SCRIPT>
<SCRIPT type = "text/JavaScript">
// Get news (Ajax get method)
Function getnews (newsid)
{
// If the newsid parameter is not passed
If (typeof (newsid) = 'undefined ')
{
Return false;
}
VaR url = "show. php? Tag = show & id = "+ newsid; // URL address for Ajax
VaR Ajax = initajax (); // instantiate an Ajax object
Ajax. Open ("get", URL, true); // use get to request
Ajax. onreadystatechange = updatepage; // call execution status
Ajax. Send (null); // send a request to the server
// Obtain the execution status
Function updatepage ()
{
// Display the Lodding chart before the request processing ends
If (Ajax. readystate <4)
{
Show_news.innerhtml = " ";
}
// After the request processing ends, the returned content is assigned to the layer specified above.
If (Ajax. readystate = 4 & Ajax. Status = 200)
{
Show_news.innerhtml = Ajax. responsetext;
}
}
}
// Add news (Ajax POST method)
Function saveuserinfo ()
{
VaR MSG = Document. getelementbyid ("MSG"); // obtain the response information layer
// Obtain the form object and user information value
VaR F = Document. user_info;
VaR username = f. user_name.value;
VaR userage = f. user_age.value;
VaR usersex = f. user_sex.value;
VaR url2 = "show. php? Tag = Add "; // URL of the receiving form
VaR poststr = "user_name =" + username + "& user_age =" + userage + "& user_sex =" + usersex; // the value to be post, connect each variable through &
VaR ajax2 = initajax (); // instantiate Ajax
Ajax2.open ("Post", url2, true); // open the connection through post
Ajax2.onreadystatechange = updatepage2; // call execution status
Ajax2.setrequestheader ("Content-Type", "application/X-WWW-form-urlencoded"); // defines the HTTP header information of the transmitted File
Ajax2.send (poststr); // send a request to the server
// Obtain the execution status
Function updatepage2 ()
{
If (ajax2.readystate = 4 & ajax2.status = 200)
{
MSG. innerhtml = ajax2.responsetext;
}
}
}
</SCRIPT>
</Head>
<Body onload = "saveuserinfo (); getnews (5);">
<A onclick = "getnews (5)" style = "cursor: Pointer"> News 1 </a>
<Div id = "show_news"> </div>
<Form name = "user_info">
Name: <input type = "text" name = "user_name"/> <br/>
Age: <input type = "text" name = "user_age"/> <br/>
Gender: <input type = "text" name = "user_sex"/> <br/>
<Input type = "button" value = "Submit" onclick = "saveuserinfo ()">
</Form>
<Div id = "MSG"> </div>
</Body>
</Html>
======================================
Server execution page show. php
<? PHP
If ($ _ Get [tag] = 'show ')
{
$ SQL = "select ID, title from news limit 0,". $ _ Get [ID];
Mysql_query ("set names 'utf8 '");
$ Item = $ Tg-> getall ($ SQL );
Sleep (1); // pause for 1 second
For ($ I = 0; $ I <count ($ item); $ I ++)
{
Echo "<a href = News. php? Nid = {$ item [$ I] ['id'] }>{$ item [$ I] ['title'] }</A> <br> ";
}
}
Else if ($ _ Get [tag] = 'add ')
{
Sleep (2); // pause for 2 seconds
If ($ _ post [user_name]! = ''& $ _ Post [user_age]! = ''& $ _ Post [user_sex]! = '')
{
$ SQL = "insert into news (title, pic_path, content) values ('". $ _ post [user_name]. "','". $ _ post [user_age]. "','". $ _ post [user_sex]. "')";
Mysql_query ("set names 'utf8 '");
$ Insert_id = $ Tg-> insert ($ SQL );
If ($ insert_id> 0)
{
Echo "inserted successfully! ";
}
}
Else
{
Echo "Incomplete Information ";
}
}
?>
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