php二维数组的有关问题，求大神解答

<br /><?php<br />$fangxiang = array(<br />  'fid101' => array("fid"=>"101","Name"=>"自动化研究所","professor"=>"张教授"),<br />  'fid102' => array("fid"=>"102","Name"=>"实验室","professor"=>"李教授"),<br />  'fid103' => array("fid"=>"103","Name"=>"科学研究所","professor"=>"王教授"),<br />);<br />?><br /><meta http-equiv="content-type" content="text/html; charset=utf-8"><br /><script type="text/javascript"><br />var fangxiang = <?php echo json_encode($fangxiang); ?>;<br /><br />function search(){<br />    var key = document.getElementById("key").value;<br />    var type = document.getElementById("type").value;<br /><br />    if(key==''){<br />        alert('请输入要搜寻的关键字');<br />        return false;<br />    }<br /><br />    var result = [];<br /><br />    for(var row in fangxiang){<br />        var tmp = fangxiang[row][type];<br />        if(tmp.indexOf(key)!=-1){<br />            result.push(row);<br />        }<br />    }<br /><br />    var response = '';<br /><br />    if(result.length>0){<br />        for(var i=0,len=result.length; i<len; i++){<br />            response += fangxiang[result[i]].fid + ' ' + fangxiang[result[i]].Name + ' ' + fangxiang[result[i]].professor + ' <br>';<br />        }<br />    }<br /><br />    document.getElementById('result').innerHTML = response;<br />}<br /></script><br /><br /><p>search key:<input type="text" id="key"></p><br /><p>type:<select id="type"><br />    <option value="Name">Name</option><br />    <option value="professor">professor</option><br /></select><br /></p><br /><p><input type="button" value="search" onclick="search()"></p>
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