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Disable Button With Javascript

Hello,

In my C# asp.net 2.0 application, I have a webform with a button server
control on it. The webform, like most others in the site, subscribes to
a master page. I have determined that the button always renders with an
id of "ct100_ContentP laceHolder1_btn Continue" in both the IE and
Firefox browsers.

I created the following javascript code segment to disable it when the
page loads. I have reasons for not wanting to do this with server side
code...

document.all['ct100_ContentP laceHolder1_btn Continue'].disabled = true;

Now, when I view this in IE, the button is disabled. But when I view it
in Firefox, it's not. Also, there are no javascript errors returned by
either browser. Also, I have already updated my browserCaps section in
web.config, if that is relevant.

Why does the button remain enabled when viewing the page with Firefox?

Sep 20 '06
11 7389
I meant:

var o = document.getEle mentById('<%=tx t_Index.ClientI D%>');
o.value = ....
"Brennan Stehling" <of******@gmail .comschreef in bericht
news:11******** **************@ m7g2000cwm.goog legroups.com...
>I agree. You never know what the hiearchy will be when your pages and
controls are used. Hard-coding the names in Javascript will ensure
they break sooner or later.

What I normally do is declare Javascript variables in a static .js file
with the major of the Javascript behavior. And then with the ASP.NET
controls, I insert script blocks which set those variables.

<script ...>
var buttonId;

functions...
</script>

<!-- later from the ASP.NET control -->

<script ...>
buttonId = 'Page_Button1';
</script>

Search for RegisterScriptB lock on MSDN.

Brennan Stehling
http://brennan.offwhite.net/blog/

Edwin Knoppert wrote:
>Forget that , use inline aspx code to pass the control's .ClientID
property.
This is the most reliable.
"Mark Rae" <ma**@markNOSPA Mrae.comschreef in bericht
news:e4******* *******@TK2MSFT NGP04.phx.gbl.. .
"Joey" <jo*********@to pscene.comwrote in message
news:11******** **************@ h48g2000cwc.goo glegroups.com.. .

Okay, nevermind. I cleared the cache in Firefox, and now it works.

BTW, you could make your HTML more readable by giving your
MasterPage(s)
and ContentPages meaningful IDs... E.g. in the code behind your
MasterPage:

protected void Page_Init(objec t sender, EventArgs e)
{
this.ID = "MyMasterPa ge";
}

And then explicitly name every ContentPage in its HTML e.g.

<asp:Content ContentPlaceHol derID="MyConten tPage" runat="server">
<asp:TextBox ID="MyTextBox" runat="server" />
</<asp:Content>

Then, client side, your control will ALWAYS be called
MyMasterPage_My ContentPage_MyT extBox- this makes your life massively
easier because it means you don't have to ask ASP.NET to tell you the
controls'IDs, as you already know them.

In this way, you can use client-side JavaScript to refer to your
controls
in two ways:

document.aspnet Form.MyMasterPa ge_MyContentPag e_MyTextBox

or

document.getEle mentById('MyMas terPage_MyConte ntPage_MyTextBo x')

Also, don't forget that no matter what ID you give the <formtag in
your
MasterPage, ASP.NET will ALWAYS rename it to aspnetForm :-)

Sep 22 '06 #11
"Edwin Knoppert" <ne**@hellobasi c.comwrote in message
news:45******** **************@ text.nova.plane t.nl...
var o = document.getEle mentById('<%=tx t_Index.ClientI D%>');
o.value = ....
Yes, I agree that is more robust...
Sep 22 '06 #12

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