I need to enable and disable a button using JavaScript, ASP and ASP.NET

I have a simple request that I would like to create a test program which uses JavaScript to disable (then re-enable) an ASP button.  I would also like to see how the same thing's done with ASP.NET.

Maybe someone could post a simple program with two buttons where when you click one, it enables the other and disables the button you clicked.   I would love to see that in ASP as well as ASP.NET.

I would be happy to write it, but I think it may be easier for someone to write than explain.

Thanks,
newbieweb
newbiewebSr. Software EngineerAsked:
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bluV11tCommented:
Hi!
Here is the JavaScript version:


<input type="button" value="Disable" onclick="JavaScript: document.getElementById('third_button').disabled = true;" />
<input type="button" value="Enable" onclick="JavaScript: document.getElementById('third_button').disabled = false;" />
<input type="submit" value="3. button" id="third_button" />

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Tomarse111Commented:
Here you go. Two buttons, one disables the other onclick:
<script type="text/javascript">
function bttns(id) { 
	if(id=="a"){
		document.getElementById('bttn2').disabled=false;
		document.getElementById('bttn1').disabled=true;
	}else{
		document.getElementById('bttn2').disabled=true;
		document.getElementById('bttn1').disabled=false;	
	}
}
</script>
<body id="doc">
	<input id="bttn1" type="button" value="Button 1" onclick="bttns('a');">
	<input disabled="disabled" id="bttn2" type="button" value="Button 2" onclick="bttns('b');">
</body>

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bluV11tCommented:
Sorry, I misread your question. Here's a new version:
<input type="button" value="First" id="first_button" onclick="JavaScript: document.getElementById('first_button').disabled = true;document.getElementById('second_button').disabled = false;" />
<input type="button" value="Second" id="second_button" onclick="JavaScript: document.getElementById('first_button').disabled = false;document.getElementById('second_button').disabled = true;" />

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newbiewebSr. Software EngineerAuthor Commented:
Tomarse111,

I used your code sinnce it was all in one place.  Could you do the same thing with ASP.NET? I'm trying to learn both technologies at the same time...


newbieweb
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BTosonCommented:
Well for ASP.NET you would just put something like Button.Enabled = False in your code.
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newbiewebSr. Software EngineerAuthor Commented:
Where would you put that line?  LLike this?

document.getElementById('bttn2').Enable = false;

what about the controls?  How are they different?
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BTosonCommented:
If you are referring to ASP.NET then it would go in your code behind.
This change would occur on the server and not on the client directly.
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newbiewebSr. Software EngineerAuthor Commented:
I see.  Code behind makes it easy for me to do: I'm a WinForms C# developer.  But I need to learn the HTML side of ASP.NET.

Thanks,
newbieweb

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BTosonCommented:
Then the JavaScript methods above are the ebst way.  Unless you want to do it all server side with a postback!
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