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Example code for ajax to perfectly implement the paging function of two webpages

Source: Internet
Author: User
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Paging Homepage

Copy codeThe Code is as follows: <meta http-equiv = "Content-Type" content = "text/html; charset = utf8"/>
<H1 align = "center"> pagination of martial arts novels <Br/>
<Script src = "jquery-1.4.2.min.js"> </script>
<Script>
Var page = '';
Function init (page ){
Document. getElementById ("tables"). innerHTML = '';
Var xhr;
If (window. XMLHttpRequest ){
Xhr = new XMLHttpRequest ();
} Else if (window. ActiveXObject ){
Xhr = new ActiveXObject ("Microsoft. XMLHTTP ")
}
Var url = "fenye. php ";
Xhr. open ("POST", url, true );
Xhr. onreadystatechange = callback;
Xhr. setRequestHeader ("Content-Type", "application/x-www-form-urlencoded ");
If (page ){
Xhr. send ("page =" + page );
}
Else {xhr. send ("page = 1 ");}
Var content;
Function callback (){
If (xhr. readyState = 4 ){
If (xhr. status = 200 ){
Var json = eval ('+ xhr. responseText + ')');
// Alert (xhr. responseText );
Var fenye = json. str;
// Alert (fenye );
Document. getElementById ('div '). innerHTML = fenye;
Content = "<th> ID </th> <th> name </th> <th> author </th> <th> press </th> <th> ISBN No. </th> <th> type </th> <th> price </th> ";
For (var I = 0; I <json.info. length; I ++ ){
Content + = "<tr> <td>" + json.info [I]. id + "</td> <td>" + json.info [I]. name + "</td> <td>" + json.info [I]. author + "</td> <td>" + json.info [I]. publisher + "</td> <td>" + json.info [I]. isbn + "</td> <td>" + json.info [I]. type + "</td> <td>" + json.info [I]. price + "</tr> ";
Document. getElementById ("tables"). innerHTML = content;
}
// Alert (fenye );
}
}
}
}

</Script>

<Body onLoad = "init ()">
<H3 align = "center"> jquery implementation $. ajax pagination <Table id = "tables" style = "width: 500px; height: 100px; text-align: center "align =" center "border =" 5 "bordercolor =" # FF6600 ">
<Th> ID </th> <th> name </th> <th> author </th> <th> press </th> <th> ISBN number </th>> <th> type </th> <th> price </th>
</Table>
<Table align = "center" style = "margin-top: 15px">
<Tr> <td>
<Td style = "colspan: 3; height: 20">
<Div id = "div" style = "position: absolute; left: 447px; top: 218px; width: 411px; height: 22px;"> </div>
</Td>
</Tr>
</Table>
<Br/>
</Body>

Paging php essential code

Copy codeThe Code is as follows: <? Php
// Process data at the command model layer
$ Link = mysql_connect ('localhost', 'root', '') or die (" failed ");
Mysql_select_db ('books ', $ link) or die ("An error occurred while connecting to the database! ");
// Number of records displayed per page
$ Pagesize = 2;
// Obtain the total number of records
$ SQL = "select count (*) as total_rows from books ";
$ Result = mysql_query ($ SQL );
$ Total_rows = mysql_fetch_array ($ result );
// Calculate the total number of page numbers
$ Pages = ceil ($ total_rows [0]/$ pagesize );
// Current page
$ Page = $ _ POST ['page'];
$ Strtext = "current section". $ page. "page". "Total". $ pages. "page". "Total". $ total_rows [0]. "record ";
// Var_dump ($ str );
// Next, I will find the corresponding data based on the page number currently clicked
$ Offset = $ pagesize * ($ page-1 );
$ SQL = "select * from books limit $ offset, $ pagesize ";
Mysql_query ("set names utf8 ");
$ Res = mysql_query ($ SQL );

$ Rows = array ();
While ($ row = mysql_fetch_assoc ($ res )){
$ Rows [] = $ row;
}
$ PageInfo = $ rows;
// Echo json_encode ($ pageInfo );
// Var_dump ($ pageInfo );
// Get the data link and return it
$ First = 1;
$ Prev = $ page-1;
$ Next = $ page + 1;
$ Last = $ pages;

// Display data at the command view layer
$ First_a = "<a onclick = 'init (". $ first. ") 'href = '#'> </a> ";
If ($ page> 1 ){
$ Prev_a = "<a onclick = 'init (". $ prev. ") 'href = '#'> </a> ";
}
If ($ page <$ pages ){
$ Next_a = "<a onclick = 'init (". $ next. ") 'href = '#'> </a> ";
}
$ Last_a = "<a onclick = 'init (". $ last. ") 'href = '#'> </a> ";
@ $ Str = $ strtext. $ first_a. $ prev_a. $ next_a. $ last_a;
// Var_dump ($ str );
$ Info = array ('str' => $ str, 'info' => $ pageInfo );
Echo json_encode ($ info );

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