/***شمس المستقبل***/
 $(function(){if($('input#username_reg').length){$('input#username_reg').keyup(function(){if($('#username_reg').attr('value')==''){$('input#username_reg').removeClass('okusername')}else{url='/search?mode=searchuser&fieldname=username&search_username='+encodeURIComponent($('input#username_reg').val());$.get(url,function(data){if($('select[name=username_list] option',data).val().toLowerCase()==$('input#username_reg').val().toLowerCase()){$('input#username_reg').removeClass('okusername')}else{$('input#username_reg').addClass('okusername')}})}})}});

/***شمس المستقبل***/
#username_reg {
 background-image: url(https://i.servimg.com/u/f45/15/95/28/21/warnin10.png);
 background-repeat: no-repeat;
 background-position: left;
     }
#username_reg {
height: 35px;
 width: 145px;  }

#username_reg.okusername {
 background-image: url(https://i.servimg.com/u/f45/15/95/28/21/true11.png);
 background-repeat: no-repeat;
 background-position:  left;

}
#username_reg {
border:2px solid red!important;
}
#username_reg.okusername {
border:2px solid green!important;
}