clear textbox but giving error using java script

Question

I'm trying to clear textbox by using this javascript code:

document.getElementById("txtUnit").value = "";

or:

document.getElementById("txtUnit").innerHTML= "";

both are not working .just getting error like this:

typeerror document.getelementbyid(...) is null

This question should be tagged with javascript rather than asp.net-mvc, as that is not relevant to the problem described or the code posted. — Peter Herdenborg
– Peter Herdenborg, Commented Dec 22, 2014 at 10:31

Sid M · Accepted Answer · 2014-12-22 10:33:27Z

1

Right click on the element and look at the generated HTML in your browser. Probably you do not have a txtUnit there, as txtUnit is the server-side id. You need to refer to it as txtUnit.ClientID.

EDIT: More information

getElementById is null if the id was not found in your HTML. You must make sure that you have the id there and that your element was already created when you try to find it by id.

edited Dec 22, 2014 at 10:33

Sid M

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answered Dec 22, 2014 at 10:30

Lajos Arpad

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