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Debug Javascript

Break40
Break40 asked
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I have a button that I want to move from the left to the right side when clicked. I am copying the code directly out of the book and it won't work. Maybe I missed something, but I can't see where. The page can be viewed here:

http://domgarofalo.com/ch_9_assess.html

Any help is appreciated.
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Commented:
Please let me know what you find.
In firebug it says switch_sides is not defined
please paste the ch_9_assess.js code??
i don't see switch_sides() in your js code.

So onclick is calling a function that doesn't exsist.

<input type="button" value="Change Sides" id="change_sides" onclick="switch_sides();" />

your js is:

var the_button = document.getElementById("change_sides"); //DOM switches sides of the button on click, but not working!
the_button.onclick = function() {
  document.dir = (document.dir!="ltr") ? "ltr" : "rtl";
}

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Try putting that inside:
function switch_sides(){
var the_button = document.getElementById("change_sides"); //DOM switches sides of the button on click, but not working!
the_button.onclick = function() {
  document.dir = (document.dir!="ltr") ? "ltr" : "rtl";
}
}

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