Phone number validation

<script type="text/javascript">
//<![CDATA[

  
    Validation.add('validate-mobile','<?php echo Mage::helper('contacts')->__('Please enter your mobile number.'); ?>',function (v, elm) {
          
        var reMax = new RegExp(/^maximum-length-[0-9]+$/);
        var reMin = new RegExp(/^minimum-length-[0-9]+$/);
      
        var result = true;
      
        if(Validation.get('IsEmpty').test(v))
        {
           result =false;
        }
      
      
        $w(elm.className).each(function(name, index) {
            if (name.match(reMax) && result) {
               var length = name.split('-')[2];
               result = (v.length <= length);
            }
            if (name.match(reMin) && result && !Validation.get('IsEmpty').test(v)) {
                var length = name.split('-')[2];
                result = (v.length >= length);
            }
          
        });
        return result;
    });
  
  
    var contactForm = new VarienForm('mobile_appForm',false);
  
  
  
 
//]]>
jQuery(document).ready(function(){
    var contactForm = new VarienForm('mobile_appForm',false);
    jQuery("#mobileappbuttom").click(function(e){
            if(contactForm.validator && contactForm.validator.validate()){
                e.preventDefault();
                var base_url=jQuery.trim(jQuery("#base_url").val());
                var mobile_number=jQuery("#mobile_number").val();
                jQuery.ajax({
                    url: base_url+'contacts/index/mobileapp/',
                    type:        'post',
                    data:({'mobile_number':mobile_number}),
                    success: function(msg){
                       jQuery("#aleart-text").text(msg);
                       //jQuery("#aleart-texterror").hide();
                        Effect.Appear('aleart-text', { duration: 0.2, delay: 1 });
                    }
                });
              
            }else {
                jQuery("#aleart-text").css({"display":"none"});
              //  jQuery("#aleart-texterror").text("Please enter your mobile number.");
            }
          
          
        });
  
    });
</script>

How to write mobile number length validation in magento by prototype

<input type="text" id="mobile" name="mobile" title="Mobile" class="input-text required-entry validate-length maximum-length-10 minimum-length-10 validate-digits">

how to get parent Category Id by sub category - Magento

echo $cat_idd = $this->getCurrentCategory()->getParentCategory()->getId();

=============================================
$pre_cat        =       Mage::getModel('catalog/category')->load($catarry[0]);
       
        $cat_idd   = $pre_cat->getParentCategory()->getId();

Category attributed remove

 require_once("app/Mage.php");
 Mage::app('default');
 Mage::app()->setCurrentStore(

Mage_Core_Model_App::ADMIN_STORE_ID);
 $setup = new Mage_Eav_Model_Entity_Setup('core_setup');
 $entityTypeId = $setup->getEntityTypeId('catalog_category');

 $setup->removeAttribute($entityTypeId,'category_video');

Custom mail send

      //send coupon code by email start
                $to= $customer_mail;
                $sender=Mage::getStoreConfig('trans_email/ident_general/email');
                $subject="Dokan.in Coupon Code for FB Like";
                $logo_img= Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA).'/email/dokan-logo.png';
                $baseurl= Mage::getBaseUrl();
               
                $message .='<body style="font-family: Arial;">
                                <table cellpadding="0" cellspacing="0" border="0" width="650" align="center" style="border:1px solid #ccc;background:#ffffff">
                                    <tr><td height="20"></td></tr>
                                    <tr><td style="text-align: center;"><a href="'.$baseurl.'" target="_blank"><img src="'.$logo_img.'" alt="" /></a></td></tr>
                                    <tr><td style="font-weight: bold; font-size: 30px; color: #e32915; text-align: center;">Apply '.$couponCode.'in your next purchase.</td></tr>
                                    <tr><td height="50"></td></tr>
                                    <tr><td height="18"></td></tr>
                                    <tr><td style="text-align: center;"><a href="'.$baseurl.'" target="_blank" style="font-weight: bold; font-size: 44px; color: #0849ca; text-decoration: none;">www.dokan.in</a></td></tr>
                                    <tr><td style="padding:2px 0; font-size: 15px; font-weight: bold; color: #333; text-align: center;">BUY GROCERY &amp; VEGETABLES ONLINE</td></tr>
                                    <tr><td height="20"></td></tr>
                                    <tr><td style="padding:12px 0 10px; font-size: 15px; font-weight: bold; color: #333; text-align: center; background: #ffd21d;">DELIVERY AREA: CHANDANNAGAR, CHINSURAH, MANKUNDU</td></tr>
                                </table>
                            </body>';
                                    
                   $headers = "MIME-Version: 1.0" . "\r\n";
                   $headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
                   $headers .= 'From:Dokan.in coupon code<'.$sender . ">\r\n";
                   mail($to,$subject,$message,$headers);
               

Programmatically coupon code created in magento

                  $couponCode=Mage::helper('core')->getRandomString(16);
               
              
                $coupon = Mage::getModel('salesrule/rule');
                $coupon->setName("Coupon for ".$customer_mail." on ".date('Y-m-d H:i:s'))
               ->setDescription(null)
               ->setFromDate(date('Y-m-d'))
               ->setCouponType(2)
               ->setCouponCode($couponCode)
               ->setUsesPerCoupon(1)
               ->setUsesPerCustomer(1)
               ->setCustomerGroupIds(array(1,2,3,4))
               ->setIsActive(1)
               ->setStopRulesProcessing(0)
               ->setIsAdvanced(1)
               ->setProductIds('')
               ->setSortOrder(0)
               ->setSimpleAction('by_fixed')
               ->setDiscountAmount(250)
               ->setDiscountQty(null)
               ->setDiscountStep('0')
               ->setSimpleFreeShipping('0')
               ->setApplyToShipping('0')
               ->setIsRss(0)
               ->setWebsiteIds(array(1));
                $coupon->loadPost($coupon->getData());
                $coupon->save();

Magento send mail load by template id

                        $post = array();
                        $post['customer'] = $finelurl;
                        $postObject = new Varien_Object();
                        $postObject->setData($post);
                        $emailTemplate  = Mage::getModel('core/email_template')->load(5); //Templated id Forgot Password
                       
                        $emailTemplate->setSenderName(Mage::getStoreConfig('trans_email/ident_general/name'));
                        $emailTemplate->setSenderEmail(Mage::getStoreConfig('trans_email/ident_general/email'));
                        $emailTemplate->setTemplateSubject('Password Reset Confirmation Hisconfe');
                        $emailTemplate->send($Secondaryemail, 'test', array('data' => $postObject));