[Code] Hiện Popup phóng to khi rê vào ảnh

.ienlarger a:hover span {
  display:block;
  top: 50px; /* means the pop-up's top is 50px away from thumb's top */
  left: 90px; /* means the pop-up's left is 90px far from the thumb's left */
  z-index: 100;
 
/* If you want the pop-up open to the left of thumb, remove the left: 90px; and add
right: 90px; This would mean the right side of the pop-up is 90px far from the right side of thumb */ 

/* If you want the pop-up open above the thumb, remove the top: 50px; and add
bottom: 50px; This would mean the bottom of the pop-up is 50px far from the bottom of thumb */ 

/* add cursor:default; to this rule to disable the hand cursor only for the large image */
}

.resize_thumb {
  width: 150px; /* enter desired thumb width here */
  height : auto;
}

<div class="ienlarger"><a href="http://cntt5a.forums1.net/forum.htm"><img src="http://i226.photobucket.com/albums/dd123/anhtienbs/tienbstk.jpg" alt="thumb" class="resize_thumb" />><span>
    <img src="http://i226.photobucket.com/albums/dd123/anhtienbs/tienbstk.jpg" alt="large />

    Diễn đàn CNTT 5A</span></a></div