$(document).ready( function() {
    $("#shop_selectbox a").hover( function() {
        var changeSrc = $(this).attr("href");
        $("#target img").attr("src", changeSrc);
        $("#target img").attr("alt", $("img", $(this)).attr("alt"));
        $("#target img").removeAttr("width");
        $("#target img").removeAttr("height");
        var changeDesc = $("img", $(this)).attr("alt");
        $("#pictintro").html(changeDesc);
        return false;
    });
});