-
about client side validation
Hi all,
I want to do a client side form validation before it is submitted.
The form looks like the following:
<FORM NAME=UPLFORM ACTION="/km/index/userupload.asp?" METHOD="POST"
ENCTYPE="multipart/form-data"> Please select a file:<br />
<INPUT TYPE=FILE SIZE=36 NAME="uplfile"><BR>
<INPUT TYPE=SUBMIT NAME="SUBMIT" VALUE="Upload">
</FORM>
I want to check if the user has actually selected a file. How?
Thanks a lot
-
Re: about client side validation
Try this Frank,
Insert the following code between the <head> tags -
<script language="JavaScript">
function CheckForm (aform)
{
if (aform.uplfile.value == "")
{
alert ("Please Select a file to upload!");
}
return !(aform.uplfile.value == "");
}
</script>
And add the following onSubmit to the <form> tag -
<FORM NAME=UPLFORM ACTION="/km/index/userupload.asp?" METHOD="POST" ENCTYPE="multipart/form-data"
onSubmit="javascript:return CheckForm(this);">
Hope it helps.
Feel free to contact me is you have any trouble,
Stuart.
"Frank Y." <yangyuchen39@hotmail.com> wrote:
>
>Hi all,
>I want to do a client side form validation before it is submitted.
>The form looks like the following:
>
><FORM NAME=UPLFORM ACTION="/km/index/userupload.asp?" METHOD="POST"
> ENCTYPE="multipart/form-data"> Please select a file:<br />
> <INPUT TYPE=FILE SIZE=36 NAME="uplfile"><BR>
> <INPUT TYPE=SUBMIT NAME="SUBMIT" VALUE="Upload">
></FORM>
>
>I want to check if the user has actually selected a file. How?
>
>Thanks a lot
>
-
Re: about client side validation
It seems the file controller can input text by hand.
"Stuart" <stuartv@prologic.com.au> wrote:
>
>Try this Frank,
>
>Insert the following code between the <head> tags -
>
><script language="JavaScript">
>function CheckForm (aform)
>{
> if (aform.uplfile.value == "")
> {
> alert ("Please Select a file to upload!");
> }
> return !(aform.uplfile.value == "");
>}
></script>
>
>And add the following onSubmit to the <form> tag -
>
><FORM NAME=UPLFORM ACTION="/km/index/userupload.asp?" METHOD="POST" ENCTYPE="multipart/form-data"
>onSubmit="javascript:return CheckForm(this);">
>
>
>Hope it helps.
>
>Feel free to contact me is you have any trouble,
>
>Stuart.
>
>"Frank Y." <yangyuchen39@hotmail.com> wrote:
>>
>>Hi all,
>>I want to do a client side form validation before it is submitted.
>>The form looks like the following:
>>
>><FORM NAME=UPLFORM ACTION="/km/index/userupload.asp?" METHOD="POST"
>> ENCTYPE="multipart/form-data"> Please select a file:<br />
>> <INPUT TYPE=FILE SIZE=36 NAME="uplfile"><BR>
>> <INPUT TYPE=SUBMIT NAME="SUBMIT" VALUE="Upload">
>></FORM>
>>
>>I want to check if the user has actually selected a file. How?
>>
>>Thanks a lot
>>
>
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