主题:asp上传时出现的问题?
像这样:
<table cellpadding="0" cellspacing="0" width="100%" border="0">
<tr>
<form name="form" method="post" action="UpFile.asp" enctype="multipart/form-data" >
<td>
<input name="file1" type="file" size="30" maxlength="255" id="file1">
<input type="submit" name="Submit" value="上传" onclick="return alt(this);">
</td>
</form>
</tr>
</table>
我加了个函数:
<script language="javascript">
function alt(form1)
{
if(form1.file1.value.length==0)
{
alert("请选择要上传的文件!");
return false;
file1.focus();
}
}
</script>
为什么没有办法验证呢?谢谢!
<table cellpadding="0" cellspacing="0" width="100%" border="0">
<tr>
<form name="form" method="post" action="UpFile.asp" enctype="multipart/form-data" >
<td>
<input name="file1" type="file" size="30" maxlength="255" id="file1">
<input type="submit" name="Submit" value="上传" onclick="return alt(this);">
</td>
</form>
</tr>
</table>
我加了个函数:
<script language="javascript">
function alt(form1)
{
if(form1.file1.value.length==0)
{
alert("请选择要上传的文件!");
return false;
file1.focus();
}
}
</script>
为什么没有办法验证呢?谢谢!