Change Value of Hidden Field using Javascript
<p>I have following form where i want to assign value of "R.EmailAddress" field to a Hidden field
"email_From". </p>

<p>I tried to use the function doCalculate in Javascript but its not assigning R.EmailAddress to email_From, is it because of input type="image" ??</p>

<pre><code>&lt;form name="eMail" method="post" action="/emailform.asp" &gt;
&lt;input type="text" name="R.EmailAddress" class="textfield_contact" value=""&gt;
&lt;input type="hidden" name="email_From" value="contact@shopbyus.com"&gt;
&lt;input type="image" src="submit.gif" border="0" name="submit" value="Submit" `onClick="doCalculate(this.form)"&gt;`
</code></pre>

<p>My Javascript function looks like below</p>

<pre><code>&lt;script language="javascript" type="text/javascript"&gt;
function doCalculate(theForm){
    var aVal = theForm.R.EmailAddress.value;
    theForm.email_From.value=aVal;
    alert(aVal);
}

&lt;/script&gt;
</code></pre>
