フォームのファイル選択欄をボタン押下で表示する [JavaScript]
/* 本当は、参照（ブラウズ）ボタンでファイルを選択したら次のファイル選択欄を出したい */
/* とりあえず、Add More File ボタンを押したら表示することで我慢 */
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<title>test < /title>
<script language="JavaScript" type="text/javascript">
function appendFile(form_id, name) {
if (!document.createElement || !document.getElementById) return;
var childs = document.getElementById(form_id)
for (i = 0; i < childs.length; i++) {
var child = childs[i];
if (child.name == name && child.type == 'file' && child.value == '') {
return;
}
}
var br = document.createElement("br");
document.getElementById(form_id).appendChild(br);
var ele = document.createElement("input");
ele.setAttribute("type", "file");
ele.setAttribute("name", name);
document.getElementById(form_id).appendChild(ele);
}
< /script>
< /head>
<body>
<form id="sampleform" action="." method="post" encType="multipart/form-data" >
<input type="text" name="textvalue" /> <br />
<input type="submit" value="Submit Form" /> <br />
<input type="file" name="filedata" />
< /form>
<input type="button" value="Add More File" onclick="appendFile('sampleform', 'filedata');" />
< /body>
< /html>
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