<div class="container">
    <form class="searchbox">
        <input type="search" placeholder="Search......" name="search" class="searchbox-input" onkeyup="buttonUp();" required>
        <input type="submit" class="searchbox-submit" value="GO">
        <span class="searchbox-icon">GO</span>
    </form>
</div>

  <div class="byline"><p>Detailed tutorial on <a href="http://thecodeblock.com/realistic-soft-search-box-in-pure-css/">TheCodeBlock</a></p></div>

body{
    background:#475f77;
}

.container{
    width:600px;
    margin:50px auto;
}

.searchbox{
    position:relative;
    min-width:50px;
    width:0%;
    height:50px;
    float:right;
    overflow:hidden;
    
    -webkit-transition: width 0.3s;
    -moz-transition: width 0.3s;
    -ms-transition: width 0.3s;
    -o-transition: width 0.3s;
    transition: width 0.3s;
}

.searchbox-input{
    top:0;
    right:0;
    border:0;
    outline:0;
    background:#dcddd8;
    width:100%;
    height:50px;
    margin:0;
    padding:0px 55px 0px 20px;
    font-size:20px;
    color:red;
}
.searchbox-input::-webkit-input-placeholder {
    color: #d74b4b;
}
.searchbox-input:-moz-placeholder {
    color: #d74b4b;
}
.searchbox-input::-moz-placeholder {
    color: #d74b4b;
}
.searchbox-input:-ms-input-placeholder {
    color: #d74b4b;
}

.searchbox-icon,
.searchbox-submit{
    width:50px;
    height:50px;
    display:block;
    position:absolute;
    top:0;
    font-family:verdana;
    font-size:22px;
    right:0;
    padding:0;
    margin:0;
    border:0;
    outline:0;
    line-height:50px;
    text-align:center;
    cursor:pointer;
    color:#dcddd8;
    background:#172b3c;
}



.searchbox-open{
    width:100%;
}

.byline{
  position:absolute;
  top:150px;
  left:30%;
  text-align:center;
  font-size:18px;
}
.byline a{
  text-decoration:none;
  color: #d74b4b;
}

  $(document).ready(function(){
            var submitIcon = $('.searchbox-icon');
            var inputBox = $('.searchbox-input');
            var searchBox = $('.searchbox');
            var isOpen = false;
            submitIcon.click(function(){
                if(isOpen == false){
                    searchBox.addClass('searchbox-open');
                    inputBox.focus();
                    isOpen = true;
                } else {
                    searchBox.removeClass('searchbox-open');
                    inputBox.focusout();
                    isOpen = false;
                }
            });  
             submitIcon.mouseup(function(){
                    return false;
                });
            searchBox.mouseup(function(){
                    return false;
                });
            $(document).mouseup(function(){
                    if(isOpen == true){
                        $('.searchbox-icon').css('display','block');
                        submitIcon.click();
                    }
                });
        });
            function buttonUp(){
                var inputVal = $('.searchbox-input').val();
                inputVal = $.trim(inputVal).length;
                if( inputVal !== 0){
                    $('.searchbox-icon').css('display','none');
                } else {
                    $('.searchbox-input').val('');
                    $('.searchbox-icon').css('display','block');
                }
            }