js判断
<script type="text/javascript">
function uploadValidate(){
if(document.getElementsById("uploadfileId").value==""){
alert("请输入文件名");
name.focus;
return false;
}
return true;
}
</script>
<html:form action="/fileuploadAction" enctype="multipart/form-data" method="post">
<tr>
<td align="right">请输入文件名:</td><td><input name="name" type="text" id="uploadfileId"/></td>
</tr>
<br/>
<tr>
<td align="right">请选择要上传的文件:</td><td><html:file property="formfile"></html:file></td>
</tr>
<br><tr>
<td align="right"><html:submit value="上传" onclick="return uploadValidate(); "/></td><td> <html:cancel value="取消"/></td>
</tr>
</html:form>
为什么进入不了uploadValidate(),不进行判断直接提交表单了呢
跪求解释撒~答对的加分
<html:form name ="frm "action="/fileuploadAction" enctype="multipart/form-data" method="post">
然后将按钮替换成下面这个
<input type="button" value="上传" onclick="uploadValidate()"/>
js修改如下:
function uploadValidate(){
if(document.getElementsById("uploadfileId").value==""){
alert("请输入文件名");
name.focus;
return false;
}
frm.submit();
}追问
这样改直接报错了
/fileupload.jsp(47,1) Attribute name invalid for tag form according to TLD
好像html标签的form没有name这个属性
这句改成:
onclick="uploadValidate()"
试试