试了几种方法，都不行，到底如何判断
日期：2014-05-16 浏览次数：20373 次
试了几种方法，都不行，到底怎么判断
在没选文件的时候，直接点Update Firmware要提示。
到底怎么实现？
------解决方案--------------------
function isInProgress() {
if(document.getElementsByTagName("input")[0].value==""){
alert("请先选择一个文件");
return false;
}
var bopregd = '1';
if ( progress == 0 ) {
if (bopregd == 1) {
progress = 1;
return true;
} else {
alert('No BOP registered, could not upgrade BOP firmware.');
return false;
}
}
alert('Upload frimware is in progress, please wait for a minute.');
return false;
}
------解决方案--------------------
- HTML code
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="Pragma" content="no-cache">
<link rel="stylesheet" href="wancfg_data/stylemain.css" type="text/css">
<link rel="stylesheet" href="wancfg_data/colors.css" type="text/css">
<script language="javascript">
<!-- hide
var progress = 0;
if (document.images)
{
pic1= new Image();
pic1.src="circle.gif";
}
function isInProgress() {
var bopregd = '1';
if ( progress == 0 ) {
if (bopregd == 1) {
progress = 1;
return true;
} else {
alert('No BOP registered, could not upgrade BOP firmware.');
return false;
}
}
alert('Upload frimware is in progress, please wait for a minute.');
return false;
}
// done hiding -->
</script>
</head>
<body>
<blockquote>
<form method="post" enctype="multipart/form-data" action="uploadbopfw.cgi" onsubmit="return isInProgress();">
<b class="gentitle">Management </b><br>
<br><br>
<table border="0" cellpadding="0" cellspacing="0">
<tbody><tr>
<td>Firmware file:
</td>
<td><input name="filename" size="15" type="file"></td>
</tr>
</tbody></table>
<p align="center"><input value="Update Firmware" type="submit"></p>
</form>
</blockquote>
</body></html>
在没选文件的时候，直接点Update Firmware要提示。
到底怎么实现？
------解决方案--------------------
function isInProgress() {
if(document.getElementsByTagName("input")[0].value==""){
alert("请先选择一个文件");
return false;
}
var bopregd = '1';
if ( progress == 0 ) {
if (bopregd == 1) {
progress = 1;
return true;
} else {
alert('No BOP registered, could not upgrade BOP firmware.');
return false;
}
}
alert('Upload frimware is in progress, please wait for a minute.');
return false;
}
------解决方案--------------------
- HTML code
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="Pragma" content="no-cache">
<link rel="stylesheet" href="wancfg_data/stylemain.css" type="text/css">
<link rel="stylesheet" href="wancfg_data/colors.css" type="text/css">
<script language="javascript">
<!-- hide
var progress = 0;
if (document.images)
{
pic1= new Image();
pic1.src="circle.gif";
}
function isInProgress() {
if(document.getElementById("myfile").value == ""){alert('a');return false;} //判断是否上传文件
var bopregd = '1';
if ( progress == 0 ) {
if (bopregd == 1) {
progress = 1;
return true;
} else {
alert('No BOP registered, could not upgrade BOP firmware.');
return false;
}
}
alert('Upload frimware is in progress, please wait for a minute.');
return false;
}
// done
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