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<form method="post" action="http://localhost:5000/up_photo"enctype="multipart/form-data" class="sigma_btn light ml-4">
<div class="button">选择文件
<input type="file"size="30"name="photo"class="file"onchange="getImgURL(this)" />
</div>
<input type="submit" value="上传CT影像" class="button-new subbtn"/>
</form>
var flag = false;
function getImgURL(node) {
flag = !flag;
var path = $("input:file").val();
var name = $('input:file').attr("name");//获取name值
var ps = path.split("\\");
var filename = ps[ps.length - 1]+'<span><img src="assets/image/叉号.png" alt=""></span>';
console.log(filename)
var btnbox = $(".button");
btnbox.html(filename);
if(flag){//内容还原
btnbox.click(function(){
var inpHtml = '选择文件'+'<input type="file" size="30" name="photo"accept="image/png,image/gif,image/jpg" class="file" onchange="getImgURL(this)" />'
btnbox.html(inpHtml)
flag = !flag;
})}
}




为什么会出现这种情况???