Question

I am working on a Struts2 application. I am setting the value of a hidden field in JSP with the purpose to access it by JavaScript.

My JSP code:

<s:iterator value="collegelist">
    <tr>
        <td align="center"><s:property value="collegename"/></td>
        <s:hidden name="hiddenname" key="collegename" />  
    </tr> 
</s:iterator>

My JS code:

var myForm = document.frmAction;
var text = myForm.hiddenname.value;
alert("hidden field text is:" + text);

The alerts shows a blank value.

What is the cause and how can I solve this?

Answer 1

You generate multiple fields having the same name, since your code is inside a s:iterator tag. You should obviously have such a loop in your Javascript as well :

var hiddenFields = document.getElementsByName("hiddenname");
for (var i = 0; i < hiddenFields.length; i++) {
    alert("hidden field text is::" + hiddenFields[i].value);
}

Also, verify the the value is not blank in the generated HTML, and that the hidden fields’a name is hiddenname.