Something weird

**bensheard** · Sep 19, 2006, 08:28

Hi

I dont know why this is happening, but maybe it is supposed to happen. I have a checkbox on a page that when checked, checks all the others on that page, using getElementByTagName("input") and then checking it if the type attribute is checkbox. (tell me if you want me to post the code) This works perfectly normally, but as soon as I put a form field around it (which is neccesary) it says Object doesn't support this property or method. I have used the onclick attribute of the checkbox to execute the script, if that has something to do with it.

Thanks

**dplumlee** · Sep 19, 2006, 11:15

I would need to see the code!

**bensheard** · Sep 28, 2006, 13:46

Hi
Here is the code:

Code:

<body>
<form action = "something.php" method="post" name="f">
<input type="checkbox" name="checkall" value="1" onclick="checkall(this)"><br><br> 
<input type="checkbox" name="check1" id="check1" value="1"><br> 
<input type="checkbox" name="check2" id="check2" value="1"><br> 
<input type="checkbox" name="check3" id="check3" value="1"><br> 
<input type="checkbox" name="check4" id="check4" value="1"><br> 
<input type="checkbox" name="check5" id="check5" value="1"><br>
</form>
</body>

and this is the javascript:

Code:

function checkall(id){
var inputs = document.getElementsByTagName('input'); 
for (var i = 0; i < inputs.length; i++) 
	{ 
	if (inputs[i].getAttribute('type') == 'checkbox') 
	 {
	 if (id.getAttribute('checked') == "")
		{
		inputs[i].setAttribute('checked', '');
		}
	 else
		{
		inputs[i].setAttribute('checked', 'checked');
		}
	 }
	}
}

**jimfraser** · Sep 28, 2006, 15:14

The name of your function is the same as the name attribute of the checkbox

**bensheard** · Sep 29, 2006, 07:01

Thanks!!!!! It has been bugging me for days... it is finally working!!!

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