ShiponKarmakar

<?php
    // Email
    if(!(preg_match("/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/", $email))){}
    
    // User Name
    if(!(preg_match("/^[A-Za-z][A-Za-z0-9]{5,21}$/", $username))){}

    // Name 
    if(!(preg_match("/^(Mr|Mrs|Dr|Md)\.\ /", $name))){}
?>

ShiponKarmakar

// Check the initial Poistion of the Sticky Header
var stickyHeaderTop = $('#stickyheader').offset().top;
$(window).scroll(function(){
    if( $(window).scrollTop() > stickyHeaderTop ) {
        $('#stickyheader').css({position: 'fixed', top: '0px'});
        $('#stickyalias').css('display', 'block');
        $('#stickyheader').addClass('fix-top');
    } else {
        $('#stickyheader').css({position: 'static', top: '0px'});
        $('#stickyalias').css('display', 'none');