ajax php 聊天室实例代码

<?php
/*
ajax php 聊天室实例代码
但是必须基于以下条款:
* 署名。你必须明确标明作者的名字。.
* 非商业用途。 你不可将当前作品用于商业目的。
* 保持一致。 如果你基于当前作品更改、变换或构造新作品，你应当按照与当前协议完全相同的协议分发最终作品
* 对于任何二次使用或分发，你必须让其他人明确当前作品的授权条款
* 在得到作者的明确允许下，这里的某些条款可以放弃
此约定是法律文本 (完整的协议)的简单易读概要 
****************************************/
//****************参数设置****************
//显示在线用户
$disonline = true;
//新登陆时显示最近内容的条数(默认为30条)
$leastnum = 30;
//默认的房间名(默认是每天换一个文件)，如果去掉d，则是每月换一个文件
$room = date("y-m-d");
//房间保存路径,必须以/结尾
$roomdir = "rooms/";
//编码方式
$charset = "utf-8";
//客户端最大显示内容条数(建议不要太大)
$maxdisplay = 300;
//语言
$lang = array(
    //聊天室描述
    "description" => "欢迎来到迷你ajax聊天室。最新版本 1.2。下载请到<a href=&#39;http://phprm.com&#39; target=_blank>www.phprm.com</a>",
    //聊天室标题
    "title" => "mini ajax chatroom by longbill",
    //第一个到聊天室的欢迎
    "firstone" => "<span style=&#39;color:#16a5e9;&#39;>welcome to longbill&#39;s mini ajax chatroom!</span>",
    //当信息有禁止内容时显示
    "ban" => "i am a pig!",
    //关键字
    "keywords" => "聊天室,迷你,小型,ajax,chat,chatroom,longbill,phprm.com,php,网页特效",
    //发言提示
    "hereyourwords" => "在这里发言!"
);
error_reporting(e_all ^ e_notice ^ e_warning);
header("content-type:text/html; charset=utf-8");
$get_past_sec = 3; //如果发现丢话，可以适当调大这个值
$touchs = 10; //检查在线人数的时间间隔
if (!function_exists("file_get_contents")) {
    function file_get_contents($path) {
        if (!file_exists($path)) return false;
        $fp = @fopen($path, "r");
        $all = fread($fp, filesize($path));
        fclose($fp);
        return $all;
    }
}
if (!function_exists("file_put_contents")) {
    function file_put_contents($path, $val) {
        $fp = @fopen($path, "w");
        fputs($fp, $val);
        fclose($fp);
        return true;
    }
}
$title = $lang["title"];
$earlier = 10;
$description = $lang["description"];
$origroom = $room;
$least = ($_get["dis"]) ? intval($_get["dis"]) : $leastnum;
$touchme = $_post[&#39;touchme&#39;];
if (!is_dir($roomdir)) @mkdir($roomdir) or die("error when creating folder $roomdir");
$room = $_get[&#39;room&#39;];
if (!$room) $room = $_post["room"];
$room = checkfilename($room);
if (!$room) $room = $origroom;
$filename = $roomdir . $room . ".dat.php";
$datafile = $roomdir . $room . ".php";
if (!file_exists($filename)) @file_put_contents($filename, &#39;<?php die();?>&#39; . " " . time() . "|" . $lang["firstone"] . " ");
if (!file_exists($datafile)) @file_put_contents($datafile, &#39;<?php die();?>&#39; . " ");
$action = $_post["action"];
function checkfilename($file) {
    if (!$file) return "";
    $file = trim($file);
    $a = substr($file, -1);
    $file = eregi_replace("^[./]*", "", $file);
    $file = eregi_replace("[./]*$", "", $file);
    $arr = array(
        "../",
        "./",
        "/",
        "",
        "..",
        "."
    );
    $file = str_replace($arr, "", $file);
    return $file;
}
function get_ip() {
    global $_server;
    if ($_server) {
        if ($_server[http_x_forwarded_for]) $realip = $_server["http_x_forwarded_for"];
        else if ($_server["http_client_ip"]) $realip = $_server["http_client_ip"];
        else $realip = $_server["remote_addr"];
    } else {
        if (getenv(&#39;http_x_forwarded_for&#39;)) $realip = getenv(&#39;http_x_forwarded_for&#39;);
        else if (getenv(&#39;http_client_ip&#39;)) $realip = getenv(&#39;http_client_ip&#39;);
        else $realip = getenv(&#39;remote_addr&#39;);
    }
    return $realip;
}
function array2json($arr) {
    $keys = array_keys($arr);
    $isarr = true;
    $json = "";
    for ($i = 0; $i < count($keys); $i++) {
        if ($keys[$i] !== $i) {
            $isarr = false;
            break;
        }
    }
    $json = $space;
    $json.= ($isarr) ? "[" : "{";
    for ($i = 0; $i < count($keys); $i++) {
        if ($i != 0) $json.= ",";
        $item = $arr[$keys[$i]];
        $json.= ($isarr) ? "" : $keys[$i] . &#39;:&#39;;
        if (is_array($item)) $json.= array2json($item);
        else if (is_string($item)) $json.= &#39;"&#39; . str_replace(array(
            " ",
            " "
        ) , "", $item) . &#39;"&#39;;
        else $json.= $item;
    }
    $json.= ($isarr) ? "]" : "}";
    return $json;
}
function keeponline() {
    global $disonline, $datafile;
    if (!$disonline) return;
    $name = $_post[&#39;name&#39;];
    $ip = get_ip();
    $onlines = @file_get_contents($datafile);
    $s1 = "|{$name}|{$ip}|";
    if (strpos($onlines, $s1) === false) {
        if (strpos($onlines, "|" . $name . "|") === false) {
            $fp = @fopen($datafile, "a+");
            if ($fp) {
                if (@flock($fp, lock_ex)) {
                    @fputs($fp, time() . "|" . time() . $s1 . " ");
                    @flock($fp, lock_un);
                }
                @fclose($fp);
            }
        } else {
            echo "name";
            die();
        }
    }
}
if ($action == "write") {
    $color = $_post["color"];
    if (!eregi("[0-9a-fa-f]{6}", $color) || $color == "#000000") $color = "";
    $color = "#" . $color;
    $size = intval($_post["size"]);
    $name = htmlspecialchars(str_replace(array(
        " ",
        " "
    ) , "", $_post[&#39;name&#39;]));
    if (!$name) die("no name!!");
    $ip = get_ip();
    keeponline();
    $s = "";
    $style = "";
    $font = $_post["font"];
    if ($font == "songti") $font = "宋体";
    else if ($font == "heiti") $font = "黑体";
    else if ($font == "kaiti") $font = "楷体_gb2312";
    else $font = "";
    $style.= (!$font) ? "" : "font-family:" . $font . ";";
    $style.= (!$_post["bold"]) ? "" : "font-weight:bold;";
    $style.= (!$color || $color == "#") ? "" : "color:{$color};";
    $style.= (!$size || $size == "16") ? "" : "font-size:{$size}px;";
    $t = time();
    $arr = explode(" ", $_post[&#39;content&#39;]);
    if (count($arr) > 20) die(&#39;error&#39;);
    for ($i = 0; $i < count($arr); $i++) {
        $content = $arr[$i];
        $content = trim($content);
        $content = str_replace(array(
            " ",
            " "
        ) , "", $content);
        if (!$content) continue;
        $content = htmlspecialchars($content);
        $content = preg_replace("~[img](http://[a-za-z0-9.-_+%?]*)[/img]~i", "<img  src=&#39;$1&#39; / alt="ajax php 聊天室实例代码 " >", $content);
        $content = ($style) ? "<span style=&#39;{$style}&#39;>{$content}</span>" : $content;
        $s.= $t . "|" . $name . ":" . $content . " ";
    }
    if (!$s) die("no content!!");
    $fp = @fopen($filename, "a+");
    if (!$fp) die("repeat");
    $re_time = 0;
    while (!@flock($fp, lock_ex)) {
        sleep(1);
        $re_time++;
        if ($re_time >= 4) break;
    }
    if ($re_time < 4) {
        @fputs($fp, $s);
        @flock($fp, lock_un);
    } else die("repeat");
    @fclose($fp);
    echo "ok";
} else if ($action == "read") {
    $first = $_post["first"];
    $lastmod = intval($_post["lastmod"]) - $get_past_sec; //得到两秒以内的所有发言，
    $alastmod = @filemtime($filename);
    if ($lastmod - $alastmod > 360 * 48) die;
    $name = $_post[&#39;name&#39;];
    $name = str_replace(" ", "", $name);
    $ip = get_ip();
    $json = array();
    $json["lastmod"] = time();
    $item = array();
    $newonline = array();
    $offline = array();
    $fp = @fopen($filename, &#39;r&#39;);
    flock($fp, lock_ex);
    $s = fread($fp, filesize($filename));
    flock($fp, lock_un);
    fclose($fp);
    $lines = explode(" ", $s);
    if ($alastmod >= $lastmod && !$first) {
        foreach ($lines as $l) {
            $item2 = array();
            $l = str_replace(array(
                " ",
                " "
            ) , "", $l);
            if (strpos($l, "|") === false) continue;
            $arr = explode("|", $l);
            $t = intval($arr[0]);
            if ($t >= $lastmod) {
                $item2["time"] = date("h:i:s", $t);
                $item2["word"] = addslashes($arr[1]);
                $item[] = $item2;
            }
        }
    } else if ($first) {
        $item = array();
        $total = count($lines);
        for ($i = $total - 1; $i >= $total - $least; $i--) {
            if ($i <= 0) break;
            $item2 = array();
            $l = str_replace(array(
                " ",
                " "
            ) , "", $lines[$i]);
            if (strpos($l, "|") === false) continue;
            $arr = explode("|", $l);
            $t = intval($arr[0]);
            $item2["time"] = (date("m-d", time()) == date("m-d", $t)) ? date("h:i:s", $t) : date("m-d h:i", $t);
            $item2["word"] = addslashes($arr[1]);
            $item[] = $item2;
        }
        $item = array_reverse($item);
    }
    $s = "";
    $nt = time();
    $onlines = array();
    if ($disonline && $touchme) {
        $users = @file($datafile);
        foreach ($users as $l) {
            $l = str_replace(array(
                " ",
                " "
            ) , "", $l);
            if (strpos($l, "|") === false) {
                $s.= $l . " ";
                continue;
            }
            $arr = explode("|", $l);
            if ($nt - intval($arr[1]) < $touchs * 3) {
                if (trim($name) == trim($arr[2])) {
                    $s.= $arr[0] . "|" . time() . "|" . $name . "|" . get_ip() . "| ";
                } else $s.= $l . " ";
                $onlines[] = htmlspecialchars($arr[2]);
            }
        }
        @file_put_contents($datafile, $s);
        $json["onlines"] = $onlines;
    }
    $json["lines"] = $item;
    echo array2json($json);
} else if ($action == "keep") {
    keeponline();
    echo "keep ok";
} else if ($action == "quit") {
    $name = $_post[&#39;name&#39;];
    if ($disonline) {
        $users = @file($datafile);
        foreach ($users as $l) {
            $l = str_replace(array(
                " ",
                " "
            ) , "", $l);
            if (strpos($l, "|") === false) {
                $s.= $l . " ";
                continue;
            }
            $arr = explode("|", $l);
            if (trim($name) == trim($arr[2])) continue;
            else $s.= $l . " ";
        }
        @file_put_contents($datafile, $s);
        echo "ok";
    }
    die();
} else {
?>
<html>
<head>
 <title>迷你php+ajax聊天室演示 <?php echo $title; ?></title>
 <meta http-equiv=&#39;pragma&#39; content=&#39;no-cache&#39; />
 <meta http-equiv=content-type content="text/html; charset=<?php echo $charset; ?>" />
 <meta name="keywords" content="<?php echo $lang["keywords"]; ?>">
 <meta name="description" content="mini ajax chatroom by longbill. <?php echo $description; ?>">
<style type=&#39;text/css&#39;>
body { text-align:center; color:#333333; font-size:12px; font-family:宋体;}
a { text-decoration:none; color:#a2b700; }
.mydiv { text-align:left; margin:5px; padding:5px; border:1px solid #ff8c05; background-color:#fdd283; width:600px; }
.inputtext { border:0px; border-bottom:1px solid #333333; background-color:transparent;}
.submit { border:1px solid #ff8c05; background-color:transparent; }
.contents { border:1px solid #ff8c05;margin:5px; margin-top:10px;background-color:#ffffff; overflow:auto;word-break:break-all;word-wrap :break-word;}
.bg { background-color:#ffffff; }
.content { border:0px;background-color:transparent;width:auto; font-size:16px; font-family:fixedsys; margin:2px; padding:1px; }
.time { color:#aaaaaa; font-size:10px; font-family:arial;}
.online { margin:5px; padding:0px; display:inline; }
.mybut { width:20px; height:20px; background-color:#ff8c05; text-align:center; font-size:18px; color: #333333;}
</style>
<script>
function $(obj) {
    return document.getelementbyid(obj);
}
function setcookie(name, value, t) {
    var cookieexp = 5 * 30 * 24 * 60 * 60 * 1000; //5 months
    var cookiestr = name + "=" + escape(value) + ";";
    var expires = "";
    var d = new date();
    var t2 = (!t) ? cookieexp : t * 60 * 1000;
    d.settime(d.gettime() + cookieexp);
    expires = "expires=" + d.togmtstring() + ";";
    document.cookie = cookiestr + expires;
}
function getcookie(name) {
    var start = document.cookie.indexof(name + "=");
    var len = start + name.length + 1;
    if ((!start) && (name != document.cookie.substring(0, name.length)))
        return "";
    if (start == -1)
        return "";
    var end = document.cookie.indexof(";", len);
    if (end == -1)
        end = document.cookie.length;
    return unescape(document.cookie.substring(len, end));
}
function createajax() {
    if (window.xmlhttprequest) {
        var ohttp = new xmlhttprequest();
        return ohttp;
    } else if (window.activexobject) {
        var versions = [
            "msxml2.xmlhttp.6.0",
            "msxml2.xmlhttp.3.0"
        ];
        for (var i = 0; i < versions.length; i++) {
            try {
                var ohttp = new activexobject(versions[i]);
                return ohttp;
            } catch (error) {}
        }
    }
    throw new error("your browser doesn&#39;t support xmlhttprequest");
}
function pickcolor() {
    if (!window.isie)
        return;
    var scolor = $(&#39;dlghelper&#39;).choosecolordlg();
    var color = scolor.tostring(16);
    while (color.length < 6)
        color = "0" + color;
    window.color = color;
    color = "#" + color;
    $(&#39;div_color&#39;).style.backgroundcolor = color;
    $(&#39;div_color&#39;).value = color;
}
var isie = (document.all && window.activexobject) ? true : false;
</script>
</head>
<body >
<center>
<div class=mydiv style=&#39;text-align:center; border:0px; background-color:transparent; font-size:25px; color:#ff8c05;&#39;><?php echo $title; ?></div>
<div class="mydiv login" id=&#39;div_description&#39;>
<?php
    echo $description; ?>
</div>
<div class="mydiv rooms" id=&#39;div_msg&#39;>
<div class=&#39;contents&#39; style=&#39;height:350px;&#39; id=&#39;div_contents&#39;>loading...</div>
</div>
<div class="mydiv login" id=&#39;div_name&#39; style=&#39;display:block;&#39;>
name:<input type=text class="inputtext bg" size=8 id=&#39;chat_user&#39; value=&#39;&#39; maxlength=30 /> 
<object id=dlghelper classid="clsid:3050f819-98b5-11cf-bb82-00aa00bdce0b" width="0px" height="0px"></object>
<input class="inputtext" style=&#39;width:50px;cursor:hand;10px;background-color:#000000;color:#ffffff;&#39; id=&#39;div_color&#39; onclick="pickcolor()" value="#000000" onblur="this.style.backgroundcolor=this.value;window.color=this.value.replace(&#39;#&#39;,&#39;&#39;);" />
 size:<input class="inputtext bg" type=text style=&#39;width:20px&#39; maxlength=3 id=&#39;input_size&#39; value=&#39;16&#39; />(px)
 font:<select id=&#39;input_font&#39; class=&#39;inputtext bg&#39; style=&#39;width:70px;&#39;>
<option value=&#39;fixedsys&#39;>fixedsys</option>
<option value=&#39;heiti&#39;>黑体</option>
<option value=&#39;songti&#39;>宋体</option>
<option value=&#39;kaiti&#39;>楷体</option>
</select>
bold:<input type=checkbox id=&#39;input_bold&#39; class=&#39;inputtext&#39; style=&#39;border-bottom:0px;&#39; />
window:<a class=&#39;mybut&#39; href=&#39;#&#39; onclick=&#39;resize(1)&#39;>+</a>
 <a class=&#39;mybut&#39; href=&#39;#&#39; onclick=&#39;resize(0)&#39;>-</a>
 <a class=&#39;mybut&#39; style=&#39;width:25px;font-size:16px;&#39; href=&#39;#&#39; onclick=&#39;clearall()&#39;>clear</a>
</div>
<div class="mydiv login" id=&#39;div_word&#39;>
<textarea type=text class="inputtext bg" rows=1 scrolling=no style=&#39;height:20px;overflow:hidden;width:500px;&#39; id=&#39;chat_word&#39; onfocus="if (this.value == &#39;<?php echo $lang["hereyourwords"]; ?>&#39;) this.value=&#39;&#39;; window.editing=0; " 
 onkeydown="return check_send(event);" ><?php echo $lang["hereyourwords"]; ?></textarea>
<input type=button class=submit value=&#39;send&#39; onclick="chat_send();$(&#39;chat_word&#39;).style.height=20;" onfocus="this.blur();"/>
</div>
<div class=&#39;mydiv&#39; style=&#39;display:<?php
    if (!$disonline) echo "none"; ?>&#39; id=&#39;div_online&#39;>loading online...</div>
<script>
var debug = 0;
var lastmod =  <  ? php echo time() - $earlier * 60;
 ?  > ;
var login = 1;
var loading = false;
var olduser = getcookie(&#39;chatusername&#39;);
if (olduser != "")
    $(&#39;chat_user&#39;).value = olduser;
var room = "<?php echo $room; ?>";
var first = 1;
var dis = "<?php echo $least; ?>";
var lastword;
var color = &#39;&#39;;
var touchs =  <?php echo $touchs;?> ;
var dotouch = true;
var maxdisplay =  <?php echo $maxdisplay;?> ;
var nowdisplay = 1;
var sending = 0;
var loaded_lines = [];
var editing = 0;
function encode(s) {
    return (encodeuricomponent) ? encodeuricomponent(s) : s;
}
$(&#39;chat_user&#39;).onfocus = setonfocus;
$(&#39;input_size&#39;).onfocus = setonfocus;
function setonfocus() {
    window.editing = 1;
}
function setonblur() {
    window.editing = 0;
}
var keep_ajax;
function keeponline() {
    var name = $(&#39;chat_user&#39;).value;
    if (!name)
        return;
    keep_ajax = createajax();
    keep_ajax.open(&#39;post&#39;, &#39;<?php echo basename(__file__); ?>&#39;, 1);
    keep_ajax.setrequestheader("content-type", "application/x-www-form-urlencoded");
    keep_ajax.onreadystatechange = function () {
        if (keep_ajax.readystate == 4 && keep_ajax.status == 200) {
            //alert(keep_ajax.responsetext);
        }
    }
    keep_ajax.send("action=keep&name=" + encode(name));
}
setinterval("keeponline()", touchs * 1000);
function quitroom() {
    if (confirm("你真的要离开聊天室吗?")) {
        var ajax = createajax();
        ajax.open(&#39;post&#39;, &#39;<?php echo basename(__file__); ?>&#39;, 0);
        ajax.setrequestheader("content-type", "application/x-www-form-urlencoded");
        ajax.send("action=quit&name=" + encode($(&#39;chat_user&#39;).value));
        //alert("sending close  action=quit&name="+encode($(&#39;chat_user&#39;).value));
        //alert("response:"+ajax.responsetext);
    } else
        return &#39;&#39;;
}
document.body.onbeforeunload = quitroom;
setinterval(" load_word()", (debug) ? 6000 : 1000);
var load_word_ajax;
//下载完成后的处理函数
function load_word_change() {
    if (load_word_ajax.readystate == 4) {
        if (load_word_ajax.status != 200) {
            load_word_error();
            return;
        }
        window.loading = false;
        var body = $(&#39;div_contents&#39;);
        try {
            if (debug)
                alert(load_word_ajax.responsetext);
            eval("var arr = " + load_word_ajax.responsetext);
        } catch (e) {
            alert(&#39;error 101 json syntax error! &#39; + load_word_ajax.responsetext);
            return;
        }
        if (!arr || !arr.lastmod || typeof(arr.lastmod) == "undefined") {
            return;
        }
        var html = "";
        var line = arr.lines;
        var i = 0;
        var v1 = 0;
        var div_online = $(&#39;div_online&#39;);
        if (window.first) {
            body.innerhtml = "";
            window.first = false;
        }
        if (arr.onlines) {
            $(&#39;div_online&#39;).innerhtml = "";
            for (var i = 0; i < arr.onlines.length; i++)
                addonline(arr.onlines[i]);
        }
        for (var i = 0; i < line.length; i++) {
            var linekey = line[i].word.substring(line[i].word.length - 20, line[i].word.length) + line[i].time;
            if (window.loaded_lines[linekey] === true) {
                if (debug)
                    alert("jump:" + linekey);
                continue;
            }
            var div1 = document.createelement("div");
            window.nowdisplay++;
            if (window.nowdisplay > window.maxdisplay)
                window.nowdisplay = 1;
            if ($("contentitem" + window.nowdisplay))
                body.removechild($("contentitem" + window.nowdisplay));
            div1.classname = "content";
            div1.id = "contentitem" + window.nowdisplay;
            div1.innerhtml = line[i].word + " <span class=&#39;time&#39;>(" + line[i].time + ")</span>";
            body.appendchild(div1);
            window.loaded_lines[linekey] = true;
            body.scrolltop = 655350;
            v1 = 1;
        }
        if (v1) {
            window.focus();
            document.body.focus();
            window.lastmod = arr.lastmod;
            if (debug)
                alert("lastmod = " + arr.lastmod + " window.lastmod=" + window.lastmod);
            if ($(&#39;chat_word&#39;).disabled == false && window.editing != 1) {
                $(&#39;chat_word&#39;).focus();
            }
        }
    }
}
function load_word_error() {
    window.loading = false;
    window.status = &#39;error 102:while loading words&#39;;
    settimeout("window.status = &#39;&#39;;", 5000);
}
function load_word() {
    load_word_ajax = createajax();
    if (window.loading) {
        try {
            load_word_ajax.abort();
            window.loading = false;
        } catch (e) {}
    }
    if (!window.lastmod) {
        alert("window.lastmod=" + window.lastmod);
        return;
    }
    load_word_ajax.open(&#39;post&#39;, &#39;<?php echo basename(__file__); ?>&#39;, true);
    load_word_ajax.onreadystatechange = load_word_change;
    var urlstring = &#39;&#39;;
    urlstring += "lastmod=" + window.lastmod;
    urlstring += "&room=" + room;
    urlstring += "&action=read";
    urlstring += "&name=" + encode($(&#39;chat_user&#39;).value);
    if (window.first) {
        urlstring += "&first=true";
        urlstring += "&dis=" + dis;
    }
    //如果到了取得在线用户的时间
    if (window.dotouch) {
        urlstring += "&touchme=true";
        window.dotouch = false;
        //垃圾内存回收
        try {
            collectgarbage();
        } catch (e) {}
    }
    window.loading = true;
    if (debug)
        alert("sending:" + urlstring);
    load_word_ajax.setrequestheader("content-type", "application/x-www-form-urlencoded");
    load_word_ajax.send(urlstring);
}
function touchme() {
    window.dotouch = true;
    settimeout("touchme()", window.touchs * 1000);
}
function showalert(a, n) {
    if (!n)
        n = 0;
    if (n > 3)
        return;
    if (!a) {
        a = 0;
        b = 1;
    } else {
        a = 1;
        b = 0;
    }
    document.title = mytitle[a];
    settimeout("showalert(" + b + "," + (n + 1) + ");", 500);
}
function addonline(name) {
    if ($(name))
        return;
    var d1 = document.createelement("div");
    d1.id = name;
    d1.innerhtml = name;
    d1.classname = "online";
    $(&#39;div_online&#39;).appendchild(d1);
}
touchme();
function check_send(e) {
    if (!e)
        e = window.event;
    var obj = $(&#39;chat_word&#39;);
    if (isie)
        obj.style.height = obj.scrollheight + 3;
    if (e.keycode == 13) {
        if ((!e.shiftkey && !e.altkey && !e.ctrlkey) || !isie) {
            chat_send();
            obj.style.height = 20;
            return false;
        } else if (isie)
            obj.style.height = obj.scrollheight + 18;
    }
    return true;
}
var send_ajax;
send_ajax_change = function () {
    if (send_ajax.readystate == 4) {
        if (send_ajax.status != 200) {
            send_ajax_error();
            return;
        }
        if (debug)
            alert("send_ajax response:" + send_ajax.responsetext);
        if (send_ajax.responsetext.indexof("name") != -1) {
            alert(&#39;已经有人使用你的昵称了&#39;);
            $(&#39;chat_user&#39;).value = "";
            $(&#39;chat_user&#39;).focus();
        } else if (send_ajax.responsetext.indexof("repeat") != -1) {
            $(&#39;chat_word&#39;).value = window.lastcontent;
        }
        on_send_ok();
        if (!window.loading) {
            window.dotouch = true;
            load_word();
        }
        $(&#39;chat_word&#39;).disabled = false;
        $(&#39;chat_word&#39;).focus();
    }
}
function on_send_begin() {
    with ($(&#39;chat_word&#39;)) {
        disabled = true;
        style.backgroundcolor = "#eeeeee";
    }
    window.sending = 1;
}
function on_send_ok() {
    window.sending = 0;
    with ($(&#39;chat_word&#39;)) {
        value = &#39;&#39;;
        disabled = false;
        focus();
        style.backgroundcolor = "#ffffff";
    }
}
function on_send_error() {
    window.sending = 0;
    with ($(&#39;chat_word&#39;)) {
        disabled = false;
        focus();
        style.backgroundcolor = "#ffffff";
    }
}
function send_ajax_error() {
    alert(&#39;error 103 when send words you can send them again!&#39;);
    $(&#39;chat_word&#39;).value = window.lastcontent;
    window.sending = 0;
    on_send_error();
}
function chat_send() {
    send_ajax = createajax();
    send_ajax.open(&#39;post&#39;, &#39;<?php echo basename(__file__); ?>&#39;, true);
    send_ajax.setrequestheader("content-type", "application/x-www-form-urlencoded");
    send_ajax.onreadystatechange = send_ajax_change;
    var urlstring = &#39;&#39;;
    var name = $(&#39;chat_user&#39;).value.replace(" ", "");
    var content = $(&#39;chat_word&#39;).value;
    var bold = ($(&#39;input_bold&#39;).checked) ? "bold" : "";
    var size = parseint($(&#39;input_size&#39;).value);
    var font = $(&#39;input_font&#39;).value;
    if (name == "") {
        alert(&#39;please enter your nick name first!!&#39;);
        $(&#39;chat_user&#39;).focus();
        return;
    }
    if (content == "" || content == " " || content == " " || content == " ") {
        alert(&#39;please enter your words!&#39;);
        $(&#39;chat_word&#39;).focus();
        $(&#39;chat_word&#39;).value = "";
        return;
    }
    if (size > 100)
        size = 100;
    else if (size < 0)
        size = 1;
    urlstring += "action=write";
    urlstring += "&name=" + encode(name);
    urlstring += "&content=" + encode(content);
    urlstring += "&bold=" + bold;
    urlstring += "&color=" + window.color;
    urlstring += "&size=" + size;
    urlstring += "&font=" + font;
    urlstring += "&room=" + room;
    window.sending = 1;
    window.lastcontent = content;
    on_send_begin();
    if (debug)
        alert("sending:" + urlstring);
    send_ajax.send(urlstring);
    settimeout("if (window.sending) send_ajax.abort(); on_send_error();", 5000);
    setcookie("chatusername", $(&#39;chat_user&#39;).value);
}
function resize(s) {
    var o = $(&#39;div_contents&#39;).style;
    var h = parseint(o.height);
    h = (s) ? h + 50 : h - 50;
    if (h <= 50 || h >= 3000)
        return;
    o.height = h;
    $(&#39;div_contents&#39;).scrolltop = 655350;
}
function clearall() {
    $(&#39;div_contents&#39;).innerhtml = "";
}
</script>
</center>
</body>
</html>
<?php
}
?>