这是js
function imgCheck(){
if(document.getElementById('myFile').value==""){
alert("请选择上传文件");
return false;
}else{
return true;
}
这是我需要检查空值的
<form method="post" enctype="multipart/form-data"
action="CuploadAction.action">替换图片:<input id="myFile" type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片"></input>
</form>
<form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck()">
现在我就算选了图片也会报出请选择上传文件,不知道还需要加什么
function imgCheck(){
if(document.getElementById('myFile').value==""){
alert("请选择上传文件");
return false;
}else{
return true;
}
这是我需要检查空值的
<form method="post" enctype="multipart/form-data"
action="CuploadAction.action">替换图片:<input id="myFile" type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片"></input>
</form>
<form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck()">
现在我就算选了图片也会报出请选择上传文件,不知道还需要加什么
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
<!--
function imgCheck(){
if(document.getElementById('myFile').value==""){
alert("请选择上传文件");
return false;
}else{
return true;
}
}
//-->
</script>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck()">
<input id="myFile" type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片"></input>
</form>
<input type="submit" value="添加图片"></input>
</form>
这一段却没问题 两段公用一个js可以把
<script type="text/javascript">
<!--
function imgCheck(form){
var fileInput = form["myFile"];
if(fileInput.value==""){
alert("请选择上传文件");
return false;
}else{
return true;
}
}
//-->
</script>
<form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck(this)">
<input type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片1"></input>
</form><form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck(this)">
<input type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片2"></input>
</form><form method="post" enctype="multipart/form-data"
action="DuploadAction.action" onsubmit="return imgCheck(this)">
<input type="file" size="20" name="myFile"></input>
<input type="submit" value="替换图片3"></input>
</form>