返回Json格式不间断性出现弹出页面显示json字符串

环境
php+extjs2.2
ie浏览器
求大神帮忙看看，只想解决在ie浏览器下这个问题

图片说明

<?php
// 设定你要清除BOM的根目录（会自动扫描所有子目录和文件）
$HOME = dirname(__FILE__);
// 如果是Windows系统，修改为：$WIN = 1;
$WIN = 0;
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>UTF8 BOM 清除器</title>
    <style>
        body { font-size: 10px; font-family: Arial, Helvetica, sans-serif; background: #FFF; color: #000; }
        .FOUND { color: #F30; font-size: 14px; font-weight: bold; }
    </style>
</head>
<body>
<?php
$BOMBED = array();
RecursiveFolder($HOME);
echo '<h2>These files had UTF8 BOM, but i cleaned them:</h2><p class="FOUND">';
foreach ($BOMBED as $utf) { echo $utf ."<br />\n"; }
echo '</p>';
// 递归扫描
function RecursiveFolder($sHOME) {
    global $BOMBED, $WIN;
    $win32 = ($WIN == 1) ? "\\" : "/";
    $folder = dir($sHOME);
    $foundfolders = array();
    while ($file = $folder->read()) {
        if($file != "." and $file != "..") {
            if(filetype($sHOME . $win32 . $file) == "dir"){
                $foundfolders[count($foundfolders)] = $sHOME . $win32 . $file;
            } else {
                $content = file_get_contents($sHOME . $win32 . $file);
                $BOM = SearchBOM($content);
                if ($BOM) {
                    $BOMBED[count($BOMBED)] = $sHOME . $win32 . $file;
                    // 移出BOM信息
                    $content = substr($content,3);
                    // 写回到原始文件
                    file_put_contents($sHOME . $win32 . $file, $content);
                }
            }
        }
    }
    $folder->close();
    if(count($foundfolders) > 0) {
        foreach ($foundfolders as $folder) {
            RecursiveFolder($folder, $win32);
        }
    }
}
// 搜索当前文件是否有BOM
function SearchBOM($string) {
    if(substr($string,0,3) == pack("CCC",0xef,0xbb,0xbf)) return true;
    return false;
}
?>
</body>
</html>

自己检查这个地址是js哪些代码使用到的，是不是报错了