/**
* 為搜索框添加提示功能
* @param searchTip 提示信息
* @param searchBoxId 搜索輸入框 ID
* @param hideBoxId 關鍵字隱藏框 ID
*/
m.hint.initHint = function(searchTip, searchBoxId, hideBoxId){
var searchBox = document.getElementById(searchBoxId);
var hideBox = null;
if(searchBox){
if(hideBoxId) {
hideBox = document.getElementById(hideBoxId);
}
l.events.listen(searchBox, "blur", l.bind(m.hint.onInputBlur, null, searchBox, hideBox), false);
l.events.listen(searchBox, "focus", l.bind(m.hint.onInputFocus, null, searchBox, hideBox), false);
if(hideBox){
l.events.listen(searchBox, "change", bind(m.hint.onInputChange, null, searchBox, hideBox), false);
hideBox.value = m.hint.getInputValue(searchBox);
}

// 在這里將搜索提示賦給臨時變量
m.hint.Gh[searchBox] = searchTip;
// 如果搜索框存在, 則為搜索框加上臨時變量和灰色字的 class
m.hint.onInputBlur(searchBox);
}
};

m.hint.onInputBlur = function(searchBox, hideBox) {
m.hint.fi(searchBox);
hideBox && m.hint.onInputChange(searchBox, hideBox);
};

m.hint.fi = function(searchBox) {
if(searchBox) {
var searchTip = m.hint.Gh[searchBox];
if(searchTip && (searchBox.value.trim()=="" || searchBox.value==searchTip)) {
searchBox.setAttribute(m.hint.IS_HINT, "1");
searchBox.className += " hint";
searchBox.value = searchTip;
}
}
};