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    <p>Change your code from being called <code>onLoad</code> to be called <code>No wrap - in &lt;head&gt;</code>.</p> <p>Because the functions were inside the onLoad function scope and not the global scope, they were not readable and no javascript was being called when clicking the buttons.</p> <p>I didn't change any code, just the option on the left pane: <a href="http://jsfiddle.net/AAM7L/2/" rel="nofollow">jsFiddle</a></p> <h1>Update</h1> <p>You also had a small flaw in logic causing the classes to become intertwined. Here's what you were doing:</p> <blockquote> <p>When first object is clicked, set it's class to obj1_active. When second object is clicked set obj1's class to obj2 and set obj2's class to obj2_active.</p> </blockquote> <p>As you can see, we're crossing obj1 and obj2 classes. To solve this, we'll keep track of the last object clicked (<code>role</code>) and the class that it should be when a new object is clicked (<code>cname</code>).</p> <p>Here is the Demo: <a href="http://jsfiddle.net/AAM7L/9/" rel="nofollow">jsFiddle</a></p> <h2>Optimization</h2> <p>The code you have works, but it's not very optimized. We shouldn't need four different functions that all do essentially the same thing just to different elements.</p> <p>In this demo, I simply add and remove <code>_active</code> from the className of each element when clicked: <a href="http://jsfiddle.net/AAM7L/13/" rel="nofollow">jsFiddle</a></p> <p><strong>Lets take it a step further</strong> and use multiple classes. This is useful to be able to generalize our CSS declarations. Lets use the default classes, and only append the <code>active</code> class onto the active element and remove it when a new element is clicked.</p> <p>We'll also separate the <code>_</code> in the classNames so that <code>btn</code> is its own class as well as <code>mission</code>. This allows for us to really clean up our CSS code to improve readability as well as not need to update multiple sections when we just need a simple background color update or something of that nature.</p> <p>Here is the optimized demo: <a href="http://jsfiddle.net/AAM7L/11/" rel="nofollow">jsFiddle</a></p> <h3>Link Color</h3> <p>I'm not sure if you meant to do this, but you'll notice that the links sometimes start white then turn to black when clicked. This is because the <code>:link</code> pseudo selector only selects non-visited links. If you want it to select all links, then just use the <code>&lt;a&gt;</code> tag: <a href="http://jsfiddle.net/AAM7L/12/" rel="nofollow">Final jsFiddle</a></p>
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    1. COStill this is not solving the issue. The active colors for each buttons are different, and after one click its not using the correct DIV Active states.
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    2. COAh, I didn't notice this behavior. I added a whole section describing how to fix this as well as further optimization of your code. Hope you find it helpful!
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    3. COThank you so much. You solved my problem as well as explained the possible way to improve the codes. Excellent :)
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