function searchCdrom(){
    var keyword = $F('search_keywords');
    if(keyword.blank()){
        alert("请输入查询关键字");
    }
    else {
        $('search_form').submit();
    }
}

function searchPeriodical(){
    var keyword = $F('search_keywords');
    if(keyword.blank()){
        alert("请输入查询关键字");
    }
    else {
        $('search_form').submit();
    }
}

/**
* 搜索项目点击事件
* @Param expLink 被点击的链接组件
*/
function expand_me(expLink){
    var linkLi = expLink.parentNode.parentNode;
    var children = expLink.parentNode.parentNode.parentNode.childNodes;
    for(var i = 0; i < children.length; i++){
        child = children[i];
        if(child.id){
            if(child.id == linkLi.id){
                if(child.className == "search_item"){
                    child.style.display = "none";
                }else if(child.className == "search_item_expand"){
                    child.style.display = "block";
                }
            } else if(child.className == "search_item"){
                child.style.display = "block";
            }else if(child.className == "search_item_expand"){
                child.style.display = "none";
            }
        }
    }
}