li border change on hover?

[nikko50]

I have a horizontal list with a border on each list. how can I chane the border color when someone hovers on a list?. i tried the below but it does not work.

ul li  {

    display:block;
    width:180px;
    height:200px;
    margin:5px; 
    padding:5px;
    text-align:center;
    background-position:0 0;
    border:5px solid #E3E3E3;
}


ul li{

    float:left;
}

ul li hover {   border:5px solid red;}

[Frankie]

ul li hover {   border:5px solid red;}

should be:

ul li:hover {   border:5px solid red;}