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BOOK: JavaScript 24-Hour Trainer
This is the forum to discuss the Wrox book JavaScript 24-Hour Trainer Jeremy McPeak; ISBN: 978-0-470-64783-7
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Old March 19th, 2013, 10:45 AM
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Default Lesson 21 - tagName & className

Having trouble with tagName & className because it is null and not an object per IE9 and not a function per Firebug on Firefox.

the Javascript code I have which I used for lesson are as follows:

function mouseHandler(event)
            var eSrc = event.target;
            var type = event.type;

            if (eSrc.tagName.ToUpperCase() === "SPAN")
                if (type === "mouseover")
                    if (eSrc.className !== "button-click") 
                        eSrc.className = "button-over";
                else if (type === "mouseout")
                    if (eSrc.className !== "button-click") 
                        eSrc.className = "button-normal";
                else if (type === "click")
                    if (eSrc.className !== "button-click")
                        eSrc.className = "button-click";
                        eSrc.className = "button-over";


        eventUtility.addEvent(document, "mouseover", mouseHandler);
        eventUtility.addEvent(document, "mouseout", mouseHandler);
        eventUtility.addEvent(document, "click", mouseHandler);
Appreciate your help Thanks!
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Old June 21st, 2013, 11:38 AM
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Howdy mrubin78,

The code you provided uses ToUpperCase() instead of toUpperCase(). That should solve the problem for Firefox. As for IE9, make sure the browser is in IE9 standards mode.
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