in my view/tmpl/default.php, I want to get the Id of the input field report:

```
<div class="control-group">
    <div class="control-label"><?php echo $this->form->getLabel('report'); ?></div>
    <div class="controls"><?php echo $this->form->getInput('report'); ?></div>
</div>

```

I want to use the ID to perform a javascript function. Where can I get the ID?

```
<field name="report" type="foreignkey" class="inputbox"
        label="COM_SUBSCRIPTION_FORM_LBL_SUBSCRIPTIONS_REPORT"
        description="COM_SUBSCRIPTION_FORM_DESC_SUBSCRIPTIONS_REPORT" input_type="list" table="#__users" key_field="id" value_field="name"  required="true"  />

```