function chklogin()
{   cnt = 0;
    titlestr = "【请您注意】           \n\n";
    errstr = titlestr + "您在填写登录信息的时候：     \n\n";
    if(document.form1.username.value == "")
    {
        cnt = cnt + 1;
        errstr = errstr + cnt + ". 请填写用户名。\n";
    }
    if(document.form1.password.value == "")
    {
        cnt = cnt + 1;
        errstr = errstr + cnt + ". 请填写密码。\n";
    }
    if(document.form1.code.value == "")
    {
        cnt = cnt + 1;
        errstr = errstr + cnt + ". 请填写验证码。\n";
    }
    if(cnt == 0) return true;
    else
    {
        acnt = cnt;
        cnt = 0;
        aerrstr = errstr;
        errstr = titlestr + "您在填写登录信息的时候：     \n\n";
        window.alert(aerrstr);
        return false;	
    }
}
function showSchoolAndTeacher(obj){
    if(obj==1){
        $("showschool").style.display="block";
        $("showteacher").style.display="none";
        $("teacherschoolurl").href="list1.jsp?cid=16";
        $("school").className="tab1";
        $("teacher").className="tab2";
    }else{
        $("showteacher").style.display="block";
        $("showschool").style.display="none";
        $("teacherschoolurl").href="list1.jsp?cid=17";
        $("school").className="tab2";
        $("teacher").className="tab1";
    }
}


function CshowSchoolAndTeacher(obj){
    if(obj==1){
        $("showschool").style.display="block";
        $("showteacher").style.display="none";
        $("teacherschoolurl").href="c_list1.jsp?cid=16";
        $("school").className="tab1";
        $("teacher").className="tab2";
    }else{
        $("showteacher").style.display="block";
        $("showschool").style.display="none";
        $("teacherschoolurl").href="c_list1.jsp?cid=17";
        $("school").className="tab2";
        $("teacher").className="tab1";
    }
}

function showArticle(obj){
    if(obj==1){
        $("article1").style.display="block";
        $("article2").style.display="none";
        $("article3").style.display="none";
        $("articletab1").className="articletab1";
        $("articletab2").className="articletab2";
        $("articletab3").className="articletab3";
    }
    if(obj==2){
        $("article1").style.display="none";
        $("article2").style.display="block";
        $("article3").style.display="none";
        $("articletab1").className="articletab1on";
        $("articletab2").className="articletab2on";
        $("articletab3").className="articletab3";
    }
    if(obj==3){
        $("article1").style.display="none";
        $("article2").style.display="none";
        $("article3").style.display="block";
        $("articletab1").className="articletab1on";
        $("articletab2").className="articletab2";
        $("articletab3").className="articletab3on";
    }
	
}

function CshowArticle(obj){
    if(obj==1){
        $("article1").style.display="block";
        $("article2").style.display="none";
        $("article3").style.display="none";
        $("articletab1").className="articletab1";
        $("articletab2").className="articletab2";
        $("articletab3").className="articletab3";
    }
    if(obj==2){
        $("article1").style.display="none";
        $("article2").style.display="block";
        $("article3").style.display="none";
        $("articletab1").className="articletab1on";
        $("articletab2").className="articletab2on";
        $("articletab3").className="articletab3";
    }
    if(obj==3){
        $("article1").style.display="none";
        $("article2").style.display="none";
        $("article3").style.display="block";
        $("articletab1").className="articletab1on";
        $("articletab2").className="articletab2";
        $("articletab3").className="articletab3on";
    }
	
}

function showLayer(obj){
    if ($(obj))
        if($(obj).getElementsByTagName("li").length>0){
            $(obj).style.visibility="visible"
        }
}
function hideLayer(obj){
    if ($(obj))
        $(obj).style.visibility="hidden"
}

function TopLeft(obj,LayerId,w,h)
{
    $(LayerId).style.left=getAbsoluteLeft(obj)+w+"px";
    $(LayerId).style.top =getAbsoluteTop(obj)+h+"px";
}