GetElementByTagName

Jagjit Saini

    Untitled Page

Pls explain me these lines
var inputArr = chkbox.getElementsByTagName('input');
var labelArr = chkbox.getElementsByTagName('label');

I have nowhere mentioned in "input" , "label"

Thanks

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Suthish Nair15y ago
Accepted answer
All the controls on your page get rendered as HTML Controls.

These controls having Tag Names like input, label etc...

Run your application and view source the web page.

You can see how your check box get rendered into input controls.

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Read on:

http://www.w3schools.com/html/html_forms.asp

http://www.w3schools.com/tags/tag_input.asp
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Jiteendra Sampathirao15y ago
If you see the javascript code...there first used GetElementById then using the chkboxand get the input values means

1. Apple 2. banana 3. Grapes...(inputArr)

No of listitems(3) (labelArr)..

i hope now you got some idea...
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Jagjit Saini15y ago
Hi Jitendra

I agree with that but in this example i have nowhere mentioned "input" , "Label" . How it finds out with this

var inputArr = chkbox.getElementsByTagName('input');
var labelArr = chkbox.getElementsByTagName('label');

In Checkbox i have nowhere mentioned these 2 words

Thanks
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Jiteendra Sampathirao15y ago
Hi,

The inputArr variable would refer to a collection of all the input elements that are inside that Checkbox.

The labelArr variable would refer to a collection of all the label elements that are inside that Checkbox.

Click here for more info

Hope it help you.....
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