Get A Value From A Submitted Form

Hi, I'm new to YII Framework. What I'm trying to implement is Get a value of a dropdown function for another action to process a calculation.
First there is a form that has the dropdown,

<div class="form">
  <?php echo CHtml::beginForm('', 'POST'); ?>
    <?php echo CHtml::errorSummary($model); ?>
      <div class="row">
        <?php echo CHtml::activeLabel($model,'employeeID'); ?>
		<?php echo CHtml::activeDropDownList($model,'employeeID', CHtml::listData(Employee::model()->findAll(), 'employeeID','employeeID'), array('empty'=>'---Select one---')); ?>     
       </div>		
	 <div class="row submit">
       <?php echo CHtml::button('Submit', array('submit'=> array('salary/calsal'))); //  ?>	
     </div>	
      <?php echo CHtml::endForm(); ?>
</div>&lt!-- form -->

Then in the other form I tried to get that selected value

	public function actionCal()
	{	
		$model=new Salary;
		$this->render('calc',array(
			'model'=>$model,
		));
	}
	
	public function actionCalsal()
	{	
		$id=$_POST['$model'];
		echo $id;
	}

this is the salary controller. first action sends $model to the above form. and second action tries to get the selected value from that form. but I always end up with getting this error. Undefined index: $model

Can someone please help me to do it properly. I have to implement it as a part of my Uni stuff. Thanks in advance!