function kwdComment(obj){
    if (obj.value == obj.defaultValue){
        obj.value = '';
    }
    obj.style.color = '#000';

    obj.focus();
}

function initTxtBox(obj){
    if (obj.value != obj.defaultValue){
        obj.style.color = '#000';
    }
}

function preload_image(on_img, off_img) {
    if (document.images) {
        imgObj_on        = new Image();
        imgObj_on.src    = on_img;
        imgObj_off       = new Image();
        imgObj_off.src   = off_img;
    }
}

function search(action) {
    var f = document.search_form;

    f.action = action;
    if (f.keyword.value == f.keyword.defaultValue){
        f.keyword.value = '';
    }
    f.submit();
}