.iCanTableSort:hover{
    cursor: pointer;
}
.i-sort{
    display:inline-block;
    width:10px;
    height:13px;
    position:relative;
}
.i-sort span{
    display:inline-block;
    width:100%;
    height:100%;
    position: absolute;
    top: 1px;
}
.i-sort-pre{
    background:url("../images/sort_default.png") no-repeat;
}
.i-sort-asc{
    background:url("../images/sort_asc.png") no-repeat;
}
.i-sort-desc{
    background:url("../images/sort_desc.png") no-repeat;
}