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    <p>The problem is that <code>myCal</code> is a local variable to the <code>launchCal()</code> function. Giving the myCal variable a globally-accessible namespace will make it available to every scope. </p> <p><strong>Here's your original code</strong> (someone else accidentally put my correct code in your original question =/)</p> <pre><code>YAHOO.namespace("yuibook.calendar"); //define the lauchCal function which creates the calendar YAHOO.yuibook.calendar.launchCal = function() { //create the calendar object, specifying the container var myCal = new YAHOO.widget.Calendar("mycal"); //draw the calendar on screen myCal.render(); } //define the showCal function which shows the calendar Var showCal = function() { //show the calendar myCal.show(); } //create calendar on page load YAHOO.util.Event.onDOMReady(YAHOO.yuibook.calendar.launchCal); //attach listener for click event on calendar icon YAHOO.util.Event.addListener("calico", "click", showCal); //myCal.hide(); </code></pre> <p><strong>Now see my changes.</strong> Note the use of the global YAHOO namespace.</p> <pre><code>YAHOO.namespace("yuibook.calendar"); //define the lauchCal function which creates the calendar YAHOO.yuibook.calendar.launchCal = function() { //create the calendar object, specifying the container YAHOO.yuibook.calendar.myCal = new YAHOO.widget.Calendar("mycal"); //draw the calendar on screen myCal.render(); } //define the showCal function which shows the calendar Var showCal = function() { //show the calendar YAHOO.yuibook.calendar.myCal.show(); } //create calendar on page load YAHOO.util.Event.onDOMReady(YAHOO.yuibook.calendar.launchCal); //attach listener for click event on calendar icon YAHOO.util.Event.addListener("calico", "click", showCal); //myCal.hide(); </code></pre>
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    1. COYour answer should be in your answer, not his question. Now I have no idea what he was asking because you've changed the question to an "answer". What did he do wrong in the original question? How can someone learn from his mistake?
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    2. COI didn't do that, le dorfier did. Hopefully he changes it back. I don't have enough authority or whatever to edit other people's posts. Anyway - I rolled mine back to show my answer.
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    3. COthis answer identifies the problem but the code has a couple issues. the statement `myCal.render();` needs to be updated to `YAHOO.yuibook.calendar.myCal.render();`. also `Var showCal ... ` needs to be made `var showCal ... ` since js is case-sensitive and the correct keyword is `var` with a little v. this mistake is repeated in the source material (see comment on OP) several times. and not an issue with your answer but there is nothing in the original code to hide the calendar before the `image is clicked, so it's always visible.
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