I am using prototype.js
After dynamically generated Input elements when I do
document.getElementById() or $(Id)
I get null.
UPDATE:
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at the time of calling document.getElementById or $(Id), does the component exist in the source of page?Hemant Metalia– Hemant Metalia2011-12-09 13:25:22 +00:00Commented Dec 9, 2011 at 13:25
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create a jsfiddle to explain your question.. nobody can not help with this chunk of code.Niranjan Singh– Niranjan Singh2011-12-09 13:25:54 +00:00Commented Dec 9, 2011 at 13:25
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Your element is already appended to DOM, or you just archiving it in a var? If you appended it to DOM, did you wait persist the element creation before search in the document for the ID?Gabriel Gartz– Gabriel Gartz2011-12-09 13:26:30 +00:00Commented Dec 9, 2011 at 13:26
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4 Answers
It seems to me like you did not give any id to your input field. it looks like you only have name attribute. you should give it an id attribute too.
1 Comment
Daniel Kurka
exactly the id is missing from the dom elements
Querying the dom for elements that are dynamicly generated doesn't make a lot of sense.
When you generated the element, save a reference to it. That way your javascript doesn't do a lot of repetitive expensive queries.
To answer you specific question, it should work, and you probably forgot to insert the element into the dom.
4 Comments
Ravi Parekh
how would i insert it in dom?
Richard Neil Ilagan
@Ravi ~ oh no. there's your problem. :)
Daniel Kurka
the id is missing from the elements, as you can see from firebug they are part of the DOM
Munter
The image wasn't part of the question when I answered, so I could only guess.
The element selected with Firebug does not have an ID attribute. Therefore, you won't be able to get it by id.
Comments
As per my knowledge you are suppose to writing your JavaScript at the top of the page but the element will generate after some execution or after the execution of that java script code.
So in that case particular JavaScript code didn't got that element ID; so it will retrieve a null value and send error like that.
If possible just try to call that JavaScript at the bottom of the page OR we can say after page get load.. i think this will work for your same code..
Just try it once, if your luck with you then will get your Element Id.
Thanks.
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