$(function () {
    $('a.hover').mouseover(function () {
        $(this).children("img").attr("src", "/Company/img/Site/" + this.id + "_over.jpg"); 
    });
    $('a.hover').mouseout(function () {
        $(this).children("img").attr("src", "/Company/img/Site/" + this.id + "_out.jpg"); 
    });
});