need tip changing value of form input type="file"

[jebo100]

hi,

need a tip.
i wanted to put in a value for my input from an onclick event.

example:

<script type="text/javascript">
function change_value(frm){
frm.elements['file_up'].value="test.jpg"
}
</script>

<form action="trial.php" method="post" enctype="multipart/form-data" name="trial_input">
<input type="file" size="20" name="file_up">
<input type="button" value="val" onclick="change_value(trial_input)">
</form>

the script wont work and my firebug returns a
Security error" code: "1000

please enlighten me




JEBO
4saledavao

 

[feherke]

Hi

That would be a security problem. So the only value you can assign to an [tt]input[/tt] of type [tt]file[/tt], is empty string. Of course, there may be some obscure trick in Explorer...

Feherke.

http://rootshell.be/~feherke/

 

[BillyRayPreachersSon]

Jebo,

Just so you know why you are seeing this... it is because if you could programatically set the value of a file input, users could be tricked into visiting web pages which automatically upload sensitive files from their computer from known locations.

Dan



Coedit Limited - Delivering standards compliant, accessible web solutions

[tt]Dan's Page [blue]@[/blue] Code Couch

http://www.codecouch.com/dan/

[/tt]

 

[jebo100]

Thanks a lot guys!!!

JEBO
4saledavao

 

[Diancecht]

I hope there's not such an "obscure trick" ...

Cheers,
Dian