Не работает js?

Question

Afafks123132132165 @Afafks123132132165

JavaScript

Не работает js?

Не работает код написанный на js.Ошибка Unexpected token 'function'.

<?php
$b = [];
$inp = file_get_contents("php://input");
if(isset($_POST["nick"]) && $_POST["text"]){
$nick = $_POST["nick"];
$text = $_POST["text"];
$a = "<b>".$nick."</b></br>".$text."<br>";
$fd = fopen("chat.txt","a");
fwrite($fd,"\n");
fwrite($fd,$a);
fclose($fd);
}
if($inp == "ourForm_inp=1"){
  $fd = fopen("chat.txt","r");
  while(!feof($fd))
  {
      $str = htmlentities(fgets($fd));
      array_push($b,$str);
  }
  fclose($fd);  
  for($i = 0;$i <= count($b);$i++){
      echo $b[$i];
  }
}
?>
<html>
    <head>
        <meta charset = "utf-8">
        <title>Chat</title>
    </head>
    <body>
        <style>
            #div{
                margin: 0;
                padding: 0;
                width: 100%;
                height: 90%;
                background-color: #565755;
                text-overflow: scroll;
            }
            form{
                margin: 0;
                padding: 0;
                width: 100%;
                height: 10%;
            }
            #input{
                margin: 0;
                padding: 0;
                width: 100%;
                height: 50%;
            }
            #input1{
                margin: 0;
                padding: 0;
                width: 80%;
                height: 50%;
                float: left;
            }
            #input2{
                width: 20%;
                height: 50%;
                float: left;
            }
            #input2:hover{
                background-color: red;
            }
        </style>
        <div id = "div"></div>
        <form method = "POST">
            <input id="input" type="text" name="nick" placeholder="Имя" value="<?= $_POST['nick'] ?? '' ?>" required />
            <input id = "input1" required type = "text" name = "text" placeholder = "Текст">     
            <input id = "input2" type = "submit" name = "submit" value = "Отправить">     
        </form>
        <script>
        var div = document.getElementById('div'),
        function send(){
          var xhr = new XMLHttpRequest();

          text = encodeURIComponent(text);
          xhr.open("POST","index.php");
          xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
          xhr.send("ourForm_inp=" + "1");
          xhr.onreadystatechange = function(){
            if(xhr.readyState == 4 && xhr.status== 200){
          	  div.push(xhr.responseText());
            }
          }
        }
        setInterval(send,1000);
        </script>
    </body>
</html>