js怎么清空input file 里的值？

JavaScript021

js怎么清空input file 里的值？,第1张

html:

<input type="file" value="选择文件" id="fileInput" />

<button type="button" id="btnClear">清空文件域</button>

JS:

<script type="text/javascript">

var btn = document.getElementById("btnClear")

var file = document.getElementById("fileInput")

btn.onclick = function() {

// for IE, Opera, Safari, Chrome

if (file.outerHTML) {

file.outerHTML = file.outerHTML

} else { // FF(包括3.5)

file.value = ""

}

}

</script>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta http-equiv="Content-Type" content="text/htmlcharset=utf-8" />

<title>无标题 3</title>

</head>

<body>

<form name="form1" id="form1">

<input type="file" name="file1" size="35" value="12341"/><br>

<input type="file" name="file1" size="35" value="12341"/><br>

<input type="file" name="file1" size="35" value="12341"/><br>

<input name="btn" onclick="clear1()" type="button" value="点击我"/>

</form>

<script language="javascript" type="text/javascript">

function clear1()

{

var obj = document.getElementById('form1').file1[1]

obj.outerHTML = obj.outerHTML

document.getElementById('form1').file1[1].value=""

}

</script>

</body>

</html>

//主要理解clear方法中的内容就可以了