[Solved] Textbox Enabled/disabled Status Based On Dropdownlist Value

Yii 1.1 General Discussion
1

I have a dropdownlist and a textbox in my form. I want the textbox to be enabled only when an option is selected in the dropdownlist i.e. it is not at the empty value.


	<div class="row">

		<?php echo $form->labelEx($model,'username'); ?> 

		<?php echo $form->textField($model,'username',array('size'=>20,'maxlength'=>20, 

                                       'disabled'=>(dropdownlist value not empty)); ?> // select.value != ""

		<?php echo $form->error($model,'username'); ?>

	</div>

Kindly help me out with this.

2

If there is no value selected in the dropdown list, the textbox should be disabled. If user changes its value, the textbox should be enabled. By default, it is disabled. I have managed to detect the change event of select box using the following script.


<?php       Yii::app()->clientScript->registerScript('myselectbox', "$('#myselectbox').change(function(){ alert('changed'); });"); ?>

How do i access the textbox with id ‘username’? Like if


(document.getElementById("myselectbox").value !== "") {

                document.getElementById("username").disabled = true;

                }

                else {

                document.getElementById("username").disabled = false;

How to access its enabled/disabled property?

3

Viewed the source in Firebug and the id assigned to username was Account_username.


<?php      Yii::app()->clientScript->registerScript('myselectbox', "$('#myselectbox').change(function(){ Account_username.disabled=false; });"); ?>