Loading image using javascript

document.getElementById('divid').innerHTML = '<img src="imagepath" alt="Loading">';

How to use:

Before loading the content to div we have to use the above code with same divid

After that load your content to same div using innerHTML. We can't identify this image in localhost because it is fastly switched to content but in server we can see this image

disable form element using jquery

Using Id:

jQuery('#id').attr('disabled','disabled'); //Here id is form element id
//Enable the form element
jQuery('#id').removeAttr("disabled");

Using Name:

jQuery('input[name="elementname"]').attr('disabled','disabled'); //Here element name is form element name
//Enable the form element
jQuery('input[name="elementname"]').removeAttr('disabled');

get the text box value using jquery

By using textboxid:
jQuery('#texboxid').val();

By using name:
jQuery('input[name="textboxname"]').val();

PHP MySQL Interview Questions

http://booleandreams.wordpress.com/php-mysql-interview-question/

get second of the current time using date function in php

$second = date("s");

get number of days between two given dates using MySQL

SELECT DATEDIFF( "2007-03-07", "2007-03-01" )

Difference between include and require

require(): It will cause a fatal error and halt the execution of the script if the file not found.
include(): If the file not found a warning will be issued, but execution will continue.