$(document).ready( function() {
    $("#thumbBox01 li img").click( function() {
        var changeSrc = this.src;
        $("#target").attr("src", changeSrc);
    });
});

$(document).ready( function() {
    $("#thumbBox02 li img").click( function() {
        var changeSrc = this.src;
        $("#target2").attr("src", changeSrc);
    });
});

$(document).ready( function() {
    $("#thumbBox03 li img").click( function() {
        var changeSrc = this.src;
        $("#target3").attr("src", changeSrc);
    });
});