javascript
JS检测上传类型
<!--此特效來源來互聯網,由 Yagebu.com 收集整理-->
<!--JS檢測上傳類型-->
<h4>JS檢測上傳類型</h4>
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
extArray = new Array(".gif", ".jpg", ".png");
function LimitAttach(form, file) {
allowSubmit = false;
if (!file) return;
while (file.indexOf("\\") != -1)
file = file.slice(file.indexOf("\\") + 1);
ext = file.slice(file.indexOf(".")).toLowerCase();
for (var i = 0; i < extArray.length; i++) {
if (extArray[i] == ext) { allowSubmit = true; break; }
}
if (allowSubmit) form.submit();
else
alert("對不起，只能上傳以下格式的文件:? "?
+ (extArray.join("? ")) + "\n請重新選擇符合條件的文件"
+ "再上傳.");
}
//? End -->
</script>
<script>
document.write(extArray.join("? "));
</script>
<p>
<form method=post name=upform action="/yourcgi.cgi" enctype="multipart/form-data">
<input type=file name=uploadfile>
<p>
<input type=button name="Submit" value="Submit" οnclick="LimitAttach(this.form, this.form.uploadfile.value)">
</form>
轉載于:https://www.cnblogs.com/ie421/archive/2008/07/29/1255639.html
總結
