You need to define border-width:1px
Your code should read:
$(this).css({"border-color": "#C1E0FF",
"border-width":"1px",
"border-style":"solid"});
You should ideally use a class and addClass/removeClass
$(this).addClass('borderClass');
$(this).removeClass('borderClass');
and in your CSS:
.borderClass{
border-color: #C1E0FF;
border-width:1px;
border-style: solid;
/** OR USE INLINE
border: 1px solid #C1E0FF;
**/
}
jsfiddle working example: http://jsfiddle.net/gorelative/tVbvF/\
jsfiddle with animate: http://jsfiddle.net/gorelative/j9Xxa/
This just gives you an example of how it could work, you should get the idea.. There are better ways of doing this most likely.. like using a toggle()