function validate(form_id,email) {
   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   var address = document.forms[form_id].elements[email].value;
   if(reg.test(address) == false) {
      //alert('Invalid Email Address');
      return false;
   }else {
      return true;
   }
}
function validatePaypalForm(thisform){
	with(thisform){
	    if(customer_name.value == ''){
		    alert('Please fill in customer name');
			customer_name.focus();
			return false;
		}
		
	    if(customer_cell.value == ''){
		    alert('Please fill in customer mobile');
			customer_cell.focus();
			return false;
		}	
		
		if(!validate('paypal_form','customer_email')){
		    alert('Email address not valid');
			customer_email.focus();
			return false;		
		}

	    if(consignee_address.value == ''){
		    alert('Please fill in consignee address.');
			consignee_address.focus();
			return false;
		}


	    if(consignee_phone.value == ''){
		    alert('Please fill in consignee phone.');
			consignee_phone.focus();
			return false;
		}
		
		if(!validate('paypal_form','consignee_email')){
		    alert('Cosignee email address not valid');
			consignee_email.focus();
			return false;		
		}	
		
	    if(port_of_destination.value == ''){
		    alert('Please fill in port of destination.');
			port_of_destination.focus();
			return false;
		}


	    if(final_destination.value == ''){
		    alert('Please fill in final destination.');
			final_destination.focus();
			return false;
		}	
		
	    if(after_shipment_name.value == ''){
		    alert('Please fill in after shipment name.');
			after_shipment_name.focus();
			return false;
		}


	    if(after_shipment_phone.value == ''){
		    alert('Please fill in  after shipment phone.');
			after_shipment_phone.focus();
			return false;
		}
		
	    if(after_shipment_address.value == ''){
		    alert('Please fill in  after shipment address.');
			after_shipment_address.focus();
			return false;
		}		
	}
}