有大佬帮忙看看么？Jquery
控制台:$('#infiles') 返回null,有哪位大佬帮忙看看
code:
程序代码：<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>JSoft Mpeg Worker</title>
<style>
</style>
<script src="js/jquery.min.js"></script>
</head>
<body>
<div class="main">
<div>
<strong>输入文件路径:</strong><input id="infiles" type="text" placeholder="多个文件名用';'隔开">
<button onclick="judgeFile()">OK</button><br>
<small id="elog" style="color:red"></small>
</div><br>
<h3>编辑选项</h3>
<div><strong>提取:</strong>
<select id="seltq" value="null">
<option value="null">全部</option>
<option value="an">仅视频</option>
<option value="vn">仅音频</option>
</select>
</div><br>
<div><strong>编码:</strong>
<br> 音频:<input id="acodec" type="text" placeholder="编码器" value="copy">
<br> 视频:<input id="vcodec" type="text" placeholder="编码器" value="copy">
</div><br>
<div><strong>剪切:</strong>
<select id="selcut" value="null">
<option value="null">全部</option>
<option value="true">自定义</option>
</select>
<br> 从:<input id="cutss" type="text" placeholder="例:00:00:00.000" >
<br> 到:<input id="cutto" type="text" placeholder="例:00:00:00.000" >
</div><br>
<div><strong>分辨率:</strong>
<select id="selpx" value="null">
<option value="null">默认</option>
<option value="true">自定义</option>
</select>
<br> 宽:高=<input id="pxhw" type="text" placeholder="例:1920:-1,-1为保持比例" >
</div><br>
<div><strong>图标:</strong>
<select id="selicon" value="null">
<option value="null">无</option>
<option value="aa">左上</option>
<option value="bb">右下</option>
<option value="ab">左下</option>
<option value="ba">右上</option>
</select>
</div><br>
<div><strong>码率:</strong>
<select id="selcode" value="null">
<option value="null">默认</option>
<option value="true">自定义</option>
</select>
<br> 视频码率:<input id="videocd" type="text" placeholder="例:600" >Kbps
<br> 音频采样率:<input id="audioar" type="text" placeholder="例:40000" >Hz
</div><br>
<div><strong>倍速:</strong>
<select id="selpts" value="null">
<option value="null">默认</option>
<option value="true">自定义</option>
</select>
<br> 视频倍速:<input id="videonpts" type="text" placeholder="例:2" >x
<br> 音频倍速:<input id="audioatempo" type="text" placeholder="例:2" >x
</div><br>
<div><strong>字幕:</strong>
<select id="selsrt" value="null">
<option value="null">无</option>
<option value="true">自定义</option>
</select>
</div><br>
<div><strong>帧率:</strong>
<select id="selframe" value="null">
<option value="null">默认</option>
<option value="true">自定义</option>
</select>
<br> 帧率:<input id="videoframe" type="text" placeholder="例:24" >
</div><br>
<div><strong>拼接:</strong>
<select id="selcat" value="null">
<option value="null">无</option>
<option value="true">是</option>
</select>
</div><br>
<div><strong>音量:</strong>
<select id="selsound" value="null">
<option value="null">默认</option>
<option value="true">自定义</option>
</select>
<br> 音量:<input id="sound" type="text" placeholder="例:0.5" >
</div><br>
<br>
<div>
<a href="javascript:;" onclick="newcmd()" style="font-family:'黑体';font-size:30px">生成</a>
</div>
</div>
</body>
