function setSrchText(e) {
    var srchField = YAHOO.util.Event.getTarget(e, 1);
    if (srchField.value == '') {
        srchField.value = 'クルーズなど単語を入力';
    }
}

function clearSrch(e) {
    var srchField = YAHOO.util.Event.getTarget(e, 1);
    if (srchField.value == 'クルーズなど単語を入力') {
        srchField.value = '';
    }
}