Why Does It Sometimes Display 'undefined' - When Click On Button - Random String From RandomString Variable Appears Below Button

Nov 16, 2011

What happens is that when I click on a button, a random string from the RandomString variable appears below the button. e.g I click on the button and it displays 'AAB' and then if I click on the button again it may display 'AAE' and etc.

The problem is that sometimes it displays 'undefined'. I don't wanit 'undefined' to appear but why does it sometimes display 'undefined' rather than a Random string.

Below is the code:

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when I click on a button, it should display below the button a random randomStrings(AAA, AAB, AAC, AAD, or AAE). The problem is that when I click on the button nothing is being displayed. Instead it just re-opens the web page I am on.

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Below is my code

<head>
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<script type="text/javascript">

[Code].....

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[URL]

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[code]
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