javascript - document.getElementbyId() returning null

In the code at the line marked as //Error in comments. I get Javascript error saying: "Cannot read property style of 'null'". I have no idea what it is not able to find the object. I have thought and tried everything. Please help. Here is the code:

    


    


     
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Answer

You are executing your javascript code BEFORE the

was actually created.

Also note that you did not close your

with a corresponding

.

So move your javascript code to a part below your HTML. Or execute it after the page finished loading. If you are using JQuery you can do: