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I am Getting an Error Unable to set value of the property 'className': Error?

Posted on 2014-10-01
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Last Modified: 2014-10-02
I am setting a class to a different class.

I am doing the coding as follows:
document.getElementById("prevowners-section").className = "subnav-target";

When the new class name is entered, an error occurs:
Unable to set value of the property 'className':  object is null or undefined

Thanks,

Dan
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Question by:danielolorenz
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3 Comments
 
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Assisted Solution

by:leakim971
leakim971 earned 250 total points
ID: 40354541
Test page : http://jsfiddle.net/rqLmgjjp/

document.getElementById("prevowners-section").setAttribute("class", "subnav-target");

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LVL 75

Accepted Solution

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Michel Plungjan earned 250 total points
ID: 40357009
@Leakim: Identical result

http://jsfiddle.net/mplungjan/83v9mqef/
document.getElementById("prevowners-section1").setAttribute("class", "subnav-target");
document.getElementById("prevowners-section2").className="subnav-target";

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More likely need is to use
window.onload=function() {
  document.getElementById("prevowners-section").className="subnav-target";
}

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LVL 75

Expert Comment

by:Michel Plungjan
ID: 40357106
Hi, not to be picky, but what was Leakim's contribution to solving your issue?

If the issue was that the prevowners-section was not rendered at the time you executed your script, then the window.onload was the solution.

Thanks
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