Hi,
Thanks for replying..
I tried as you provided solution but till facing same problem.
Also tried following ways but not working properly.....
$form->addElement('select', 'sel1, 'Sel1:',$arr_sel,array('id'=>'sel1','display'=>'none'));
$form->addElement('select', 'sel2', 'Sel2:',array(),array('id'=>'sel2','display'=>'none'),$sel2_data);
Utils_ChainedSelectCommon::create('sel2',array('sel1'),'modules/CRM/proforma/sel2_sel.php',array('cust_sel2'=>'1','display'=>'none'),$sel2_data);
$form->addElement('select', ''sel3', 'Sel3 :',array(),array('id'=>'sel3','display'=>'none'),$sel3_data);
Utils_ChainedSelectCommon::create('sel3',array('sel1','sel2'),'modules/CRM/proforma/sel3_sel.php',array('cust_sel3'=>'1','display'=>'none'),$sel3_data);
$form->addElement('select', 'sel4', 'Sel4 :',array(),array('id'=>'sel4','display'=>'none'),$sel4_data);
Utils_ChainedSelectCommon::create('sel4',array('sel1','sel2','sel3'),'modules/CRM/proforma/sel4_sel.php',array('cust_sel4'=>'1','display'=>'none'),$sel4_data);
Thanks
Kishor