its javascript code can you please tell me why it is not working
<pre><code>&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;script language="javascript" type="text/javascript"&gt; 

function changeValue()
{
    var list, index, element;
    list = document.getElementsByClassName('box-title');
    for (index = 0; index &lt; list.length; ++index){
        element = list[index].innerHTML;
        if(element == "Related Products"){
            list[index].innerHTML = "Choose Extra To make It More Special";
            alert("Page is loaded");
        }
    }
} 
&lt;/script&gt;
&lt;/head&gt;
&lt;body onload =”changeValue()”&gt;
&lt;div class="box-title"&gt;Related Products&lt;/div&gt;

&lt;/body&gt;
&lt;/html&gt; 
</code></pre>
