index not reset to 0 after i get back to the page by the back key
<p>Following is the script that makes a jump menu.Using javascript i have set the index of the <code>options</code> tag to be equal to 0.The scrip works fine except one.After i jump to another page from the jump menu the index is not reset to the index 0.Instead it is set to the index where i had clicked.Why is it so ? What is the problem with script ?</p>

<p><strong>script:</strong></p>

<pre><code>window.onload = startInit;

function startInit() {
document.getElementById("newLocation").selectedIndex = 0;
document.getElementById("newLocation").onchange = jumpPage;
}

function jumpPage() {
var newLoc = document.getElementById("newLocation");
var newPage = newLoc.options[newLoc.selectedIndex].value;
if(newPage != "")
   window.location = newPage;
}
</code></pre>

<p><strong>HTML</strong></p>

<pre><code>&lt;head&gt;
&lt;meta http-equiv="Content-Type" content="text/html; charset=utf-8" /&gt;
&lt;title&gt;Untitled Document&lt;/title&gt;
&lt;script type="text/javascript" src="script.js"&gt;
&lt;/script&gt;
&lt;/head&gt;

&lt;body bgcolor="#FFFFCC"&gt;
&lt;center&gt;
&lt;form&gt;
&lt;select id="newLocation"&gt;
 &lt;option value="myworld.gif"&gt;first&lt;/option&gt;
 &lt;option value="myhome.gif"&gt;second&lt;/option&gt;
 &lt;option value="myroom.gif"&gt;third&lt;/option&gt;
 &lt;option value="mybed.jpg"&gt;fourth&lt;/option&gt;
&lt;/select&gt;
&lt;/form&gt;
</code></pre>

<p>

</p>
