function $(id) {
    return document.getElementById(id);
}

function showMenu (baseID, divID) {
    baseID = $(baseID);
    divID  = $(divID);
    if (showMenu.timer) clearTimeout(showMenu.timer);
	hideCur();
    divID.style.display = 'block';
	showMenu.cur = divID;

    if (! divID.isCreate) {
        divID.isCreate = true;
        //divID.timer = 0;
        divID.onmouseover = function () {
            if (showMenu.timer) clearTimeout(showMenu.timer);
			hideCur();
            divID.style.display = 'block';
        };

        function hide () {
            showMenu.timer = setTimeout(function () {divID.style.display = 'none';}, 400);
        }

        divID.onmouseout = hide;
        baseID.onmouseout = hide;
    }
	function hideCur () {
		showMenu.cur && (showMenu.cur.style.display = 'none');
	}
}


function searchBlur(obj){
    if(obj.value == ""){
        obj.value = "搜索：";        
        obj.style.color = "#cccccc";
    }
}

function searchFocus(obj){
    if(obj.value == "搜索："){        
        obj.value = "";
        obj.style.color = "#000000";
    }
}

function validateSearch(){
    var obj = $('searchKw');
    if(obj.value == '' || obj.value == '搜索：'){
        alert("请输入搜索的内容");
        obj.focus();
        return false;
    }
    return true;
}

function goSearch(){
    if(validateSearch())
    {
        var obj = $('searchKw');
        window.location.href='/search.aspx?kw=' + escape(obj.value);
    }
}

function checkLogin(){
    if($("tName").value.indexOf("'") != -1 || $("tPassword").value.indexOf("'") != -1){
        alert("登陆失败");
        return false;
    }
    else if ($("tName").value == "" ||  $("tPassword").value == ""){
        alert("请输入用户名和密码");
        return false;
    }
    return true;
}

function goReset()
{
    $("tName").value = "";
    $("tPassword").value = "";
}



function searchBlurSource(obj){
    if(obj.value == ""){
        obj.value = "输入教师姓名或者资源名：";        
        obj.style.color = "#cccccc";
    }
}

function searchFocusSource(obj){
    if(obj.value == "输入教师姓名或者资源名："){        
        obj.value = "";
        obj.style.color = "#000000";
    }
}

function validateSearchSource(){
    var obj = $('searchKw');
    if(obj.value == '' || obj.value == '输入教师姓名或者资源名：'){
        alert("请输入搜索的内容");
        obj.focus();
        return false;
    }
    return true;
}



function goSearchSource(){
    if(validateSearchSource())
    {
        var obj = $('searchKw');
        window.location.href='/sourceCenter.aspx?kw=' + escape(obj.value);
    }
}

function searchBlurDown(obj){
    if(obj.value == ""){
        obj.value = "输入材料名：";        
        obj.style.color = "#cccccc";
    }
}

function searchFocusDown(obj){
    if(obj.value == "输入材料名："){        
        obj.value = "";
        obj.style.color = "#000000";
    }
}

function validateSearchDown(){
    var obj = $('searchKw');
    if(obj.value == '' || obj.value == '输入材料名：'){
        alert("请输入搜索的内容");
        obj.focus();
        return false;
    }
    return true;
}

function goSearchDown(){
    if(validateSearchDown())
    {
        var obj = $('searchKw');
        window.location.href='/Down.aspx?kw=' + escape(obj.value);
    }
}



function goSearchStudent(){
    if(validateSearchSource())
    {
        var obj = $('searchKw');
        window.location.href='/Down.aspx?kw=' + escape(obj.value);
    }
}

function searchBlurStudent(obj){
    if(obj.value == ""){
        obj.value = "关键字搜索：";        
        obj.style.color = "#cccccc";
    }
}

function searchFocusStudent(obj){
    if(obj.value == "关键字搜索："){        
        obj.value = "";
        obj.style.color = "#000000";
    }
}

function validateSearchStudent(){
    var obj = $('searchKw');
    if(obj.value == '' || obj.value == '关键字搜索：'){
        alert("请输入搜索的内容");
        obj.focus();
        return false;
    }
    return true;
}

function goSearchStudent(){
    if(validateSearchStudent())
    {
        var obj = $('searchKw');
        window.location.href='/student/search.aspx?kw=' + escape(obj.value);
    }
}