var grid1 = null;
var grid2 = null;
var grid3 = null;
var grid4 = null;
function initpageinfo(gv1, gv2, gv3, gv4) {
    grid1 = document.getElementById(gv1);
    grid2 = document.getElementById(gv2);
    grid3 = document.getElementById(gv3);
    grid4 = document.getElementById(gv4);
}
function yado01(m, n) {
    for (var j = 1; m >= j; j++) {
        document.getElementById("if_" + j).style.display = "none";
    }
    document.getElementById("if_" + n).style.display = "";
    if (n == 1) {
        document.getElementById("fg3").src = "img/173_03.jpg";
        //document.getElementById("fg1").src = "images/173_02.jpg";
    } else if (n == 2) {
        document.getElementById("fg3").src = "img/173_04.jpg";
        //document.getElementById("fg2").src = "images/173_11.jpg";
    }
}
function initdefault() {
    var url = location.href;
    var res = url.indexOf("?");
    var id = null;
    if (res > 0) {
        var preurl = url.substring(res + 1).split("&");
        var preobj;
        var j = 0;
        var i;
        var result = false;
        for (i = 0; i < preurl.length; i++) {
            var reso = preurl[i].indexOf("=");
            if (reso > 0) {
                preobj = preurl[i].split("=");
            }
            else {
                id = "1";
            }
        }
        for (j = 0; j < preobj.length; j++) {
            if (preobj[j] == "id") {
                id = preobj[j + 1];
                result = true;
            }
            else {
                result = false;
            }
            if (result) {
                break;
            }
        }
        if (!result) {
            id = "1";
        }
    }
    else {
        id = "1";
    }
   
    if (id == "1") {
        document.getElementById("f_01").style.display = "";
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("lyp1").className = "current";
        document.getElementById("lyp2").className = "normal";
        document.getElementById("lyp3").className = "normal";
        document.getElementById("lyp4").className = "normal";        
    }
    if (id == "2") {
        document.getElementById("f_02").style.display = "";
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("lyp1").className = "normal";
        document.getElementById("lyp2").className = "current";
        document.getElementById("lyp3").className = "normal";
        document.getElementById("lyp4").className = "normal"; 
    }
    if (id == "3") {
        document.getElementById("f_03").style.display = "";
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("lyp3").className = "current";
        document.getElementById("lyp1").className = "normal";
        document.getElementById("lyp2").className = "normal";
        document.getElementById("lyp4").className = "normal";
    }
    if (id == "4") {
        document.getElementById("f_04").style.display = "";
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("lyp4").className = "current";
        document.getElementById("lyp1").className = "normal";
        document.getElementById("lyp2").className = "normal";
        document.getElementById("lyp3").className = "normal";
    } 
}
function tab(li, nid) {
    var tr = li.parentNode;
    var tds = tr.getElementsByTagName('li');
    for (var i = 0; i < tds.length; i++) {
        if (tds[i].className == 'current') tds[i].className = 'normal';
    } 
    li.className = 'current';
    if (nid == "f_01") {
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("f_01").style.display = "";
    }
    if (nid == "f_02") {
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("f_02").style.display = "";
    }
    if (nid == "f_03") {
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_04").style.display = "none";
        document.getElementById("f_03").style.display = "";       
    }
    if (nid == "f_04") {
        document.getElementById("f_01").style.display = "none";
        document.getElementById("f_02").style.display = "none";
        document.getElementById("f_03").style.display = "none";
        document.getElementById("f_04").style.display = "";
    }
}
function opendiv(obj) {
   // alert(document.getElementById(obj).style.display);
    if (document.getElementById(obj).style.display == "") {
        document.getElementById(obj).style.display = "none";
    }
    else {
        document.getElementById(obj).style.display = "";
    }
}
function ShowAnswer(id) {
    var idh = "u_1" + id;
    var topid = "u_1_top" + id;
    if (document.getElementById(idh) != null) {        
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}
function ShowAnswer2(id) {
    var idh = "u_2" + id;
    var topid = "u_2_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}
function ShowAnswer3(id) {
    var idh = "u_3" + id;
    var topid = "u_3_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}

function ShowAnswer4(id) {
    var idh = "u_4" + id;
    var topid = "u_4_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}

function ShowAnswer5(id) {
    var idh = "u_5" + id;
    var topid = "u_5_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}

function ShowAnswer6(id) {
    var idh = "u_6" + id;
    var topid = "u_6_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}

function ShowAnswer7(id) {
    var idh = "u_7" + id;
    var topid = "u_7_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}
function ShowAnswergv(id) {
    var idh = "u_8" + id;
    var topid = "u_8_top" + id;
    if (document.getElementById(idh) != null) {
        if (document.getElementById(idh).style.display == "") {
            document.getElementById(idh).style.display = "none";
            document.getElementById(topid).style.display = "";
        }
        else {
            document.getElementById(idh).style.display = "";
            document.getElementById(topid).style.display = "none";
        }
    }
}