form表单提交文件(input file)
包含文件上传的form表单提交,要添加属性 enctype="multipart/form-data"
<form method="post" id="create_form" action="" enctype="multipart/form-data">
	  <table style="display: table;">
		    <tr>
			      <td>任务名称:</td>
			      <td><input type="text" id="taskName" name="taskName" maxlength="40"></td>
		    </tr>
		    <tr>
			      <td">操作说明:</td>
			      <td><input type="file" id="instructions" name="instructions"></td>
		    </tr>
		    <tr>
			      <td colspan='2'>
				        <div>
					          <button type="button" id="submit-btn">提交</button>
				        </div>
			      </td>
		    </tr>
	  </table>
</form>
$("#submit-btn").click(
    function(e){
    $("#create_form").submit();
    }
)
                    
                
                
            
        
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