hi,

I'm trying to detect changes in a textbox to set a flag in
javascript.  I hook into the text boxes keypress event, which works
fine except when you press the backspace key.  In this case, the
keypress event is not raised, and my flag never gets set.

Any ideas?

Thanks
Andy

On Jul 6, 9:00 pm, Andy <ajj3***@alum.rit.edu> wrote:
Oh, I also tired the change event, but that doesn't fire until after
the control loses focus.

Thanks

Hi Andy,

According to me "onkeyup" event will work for you. But the downside is that
it will be fired too many times. However you can detach the event after the
first KeyUp with something like following:

<script type="text/javascript">

function checkChanged( tfValue )
{
alert( "In function" );
document.getElementById( "hdChanged" ).value = "true";
tfValue.setAttribute( "onkeyup", "" );
}

</script>

<form id="frmMain" action="test.html">
<input type="text" onkeyup="checkChanged( this );" />
<input type="hidden" id="hdChanged" name="hdChanged"
value="false" />
</form>


If you are looking to set the flag only when a specific Key is pressed then
do so by comparing the value of "event.keyCode" with that specific Key's Key
Code.

For Javascript Char Codes visit the following:
http://www.cambiaresearch.com/c4/702b8cd1-e5b0-42e6-83ac-25f0306e3e25/Javascript-Char-Codes-Key-Codes.aspx


Please let me know if it helps.


regards,
Joy

Show quoteHide quote

This will work only in IE. For cross-browser compatibility, you will need
something like:

var keyCode = event.keyCode ? event.keyCode : event.which ? event.which :
event.charCode;
if (keyCode == 13)    // Enter key
{
    // do something
}

Gridview render control error in content page
Advice required
Brwoser and screen width?
Server.ScriptTimeout not being observed?
VB.Net Developer, Houstan TX, Duration: 6months, ONLY Green Card / (1-140 & EAD approved)
Problems adding HyperLink controls through code.
Control is null on postback?
DAL for sharing?
The page cannot be found error message
CSS menu