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POUnable to set value of the property 'innerHTML': object is null or undefined
 

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    <p>When I try to display the result of these to functions in my page it returns an error. Error: Unable to set value of the property 'innerHTML': object is null or undefined</p> <p>The scripts work, they are not mine. I got them from working examples i found online.</p> <p>EDITEDL: I did change it, but still getting the same error</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;style&gt; #header { font-size: 5em; } &lt;/style&gt; &lt;script type="text/javascript"&gt; function updateclock() { var currentTime = new Date(); var currentHours = currentTime.getHours(); var currentMinutes = currentTime.getMinutes(); var currentSeconds = currentTime.getSeconds(); // Pad the minutes and seconds with leading zeros, if required currentMinutes = (currentMinutes &lt; 10 ? "0" : "") + currentMinutes; currentSeconds = (currentSeconds &lt; 10 ? "0" : "") + currentSeconds; // Choose either "AM" or "PM" as appropriate var timeOfDay = (currentHours &lt; 12) ? "AM" : "PM"; // Convert the hours component to 12-hour format if needed currentHours = (currentHours &gt; 12) ? currentHours - 12 : currentHours; // Convert an hours component of "0" to "12" currentHours = (currentHours == 0) ? 12 : currentHours; // Update the time display document.getElementById("clock").innerHTML = (currentHours + ":" + currentMinutes + ":" + currentSeconds + " " + timeOfDay); } function updatedate() { var d_names = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"); var m_names = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"); var d = new Date(); var curr_day = d.getDay(); var curr_date = d.getDate(); var sup = ""; if (curr_date == 1 || curr_date == 21 || curr_date == 31) { sup = "st"; } else if (curr_date == 2 || curr_date == 22) { sup = "nd"; } else if (curr_date == 3 || curr_date == 23) { sup = "rd"; } else { sup = "th"; } var curr_month = d.getMonth(); var curr_year = d.getFullYear(); document.getElementById("date").innerHTML = (d_names[curr_day] + " " + curr_date + "&lt;SUP&gt;" + sup + "&lt;/SUP&gt; " + m_names[curr_month] + " " + curr_year); } updateclock(); setInterval(updateclock, 1000); updatedate(); setInterval(updatedate, 1000); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;table&gt; &lt;tr&gt; &lt;td&gt; &lt;/td&gt; &lt;td style="text-align=center" id =header&gt; &lt;/td&gt; &lt;td&gt; &lt;span id="date"&gt;&amp;nbsp;&lt;/span&gt; &lt;span id="clock"&gt;&amp;nbsp;&lt;/span&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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