Pure css simple warning box with jitter effect_html/css_WEB-ITnose

The warning box with this effect will shake if something goes wrong

.alert-box { width: 400px; border-style: outset; position: relative; color:#555; border-radius:10px; font-family:Tahoma,Geneva,Arial,sans-serif;font-size:11px; padding:10px 10px 10px 10px; margin:auto; display: none; }      .alert-box span { font-weight:bold; text-transform:uppercase; }      .error { background:#ffecec no-repeat 10px 50%; border:1px solid #f5aca6; }

jQuery animation effect, animate for loop 4 times to move around

var $box = $('.alert-box');                  $box.html('<span>error: </span>' + data.error);                  $box.show();                  var box_left = ($(window).width() -  $box.width()) / 2;                  for(var i=1; 4>=i; i++){                      $box.animate({left:-(40-10*i)},50);                      $box.animate({left:+2*(40-10*i)},50);                  }