A:visited {
	COLOR: #3366cc; TEXT-DECORATION: none
}

A:hover {
	COLOR:yellow; //dua chuot vao se thay doi mau
	text-decoration: underline
}
INPUT {
	FONT-SIZE: 9pt; FONT-FAMILY: Verdana
}
TEXTAREA {
	FONT-SIZE: 9pt; FONT-FAMILY: Verdana
}
SELECT {
	FONT-SIZE: 9pt; FONT-FAMILY: Verdana
}
A:link {
	COLOR: #3366cc; TEXT-DECORATION: none
}

.mybutton {
	BORDER-BOTTOM: #666666 1px solid; BORDER-LEFT: #666666 1px solid; BACKGROUND-COLOR: #e2e2e2; FONT-FAMILY: Verdana, Arial, Tahoma; FONT-SIZE: 11px; BORDER-TOP: #666666 1px solid; FONT-WEIGHT: normal; BORDER-RIGHT: #666666 1px solid
}
.mybuttonSmall {
	BORDER-BOTTOM: #666666 1px solid; BORDER-LEFT: #666666 1px solid; LINE-HEIGHT: 14px; BACKGROUND-COLOR: #e2e2e2; FONT-FAMILY: Verdana, Arial, Tahoma; COLOR: #000000; FONT-SIZE: 11px; BORDER-TOP: #666666 1px solid; FONT-WEIGHT: normal; BORDER-RIGHT: #666666 1px solid
}
webbrowser {  
    filter:alpha(opacity=50); // trình duy?t IE
    -moz-opacity:0.5; // trình duy?t mozilla  
    -khtml-opacity: 0.5; // trình duy?t Safari
    opacity: 0.5; // h?u h?t các trình duy?t, nhung IE thì không.  
    }

<style type="text/css">
body{
              width:650px;
	font-family:"Lucida Grande", "Lucida Sans Unicode", Verdana, Arial, Helvetica, sans-serif; font-size:11px; color:#333333;
	background-color:#FFFFFF;
}

	/*a:link, a:visited, a:hover{text-decoration:none;}*/


.thumbnail{
position: relative;
z-index: 0;
}

.thumbnail:hover{
background-color: transparent;
z-index: 50;
}

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: #ffffff;
padding: 5px;
left: -1000px;
border: 1px solid #000;
visibility: hidden;
color: black;
text-decoration: none;
}

.thumbnail span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}

.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: -200px;
left:150px; /*position where enlarged image should offset horizontally */

}
 
</style>