//选择地区的二级分类
function selNext(oj, v) {
    var newobj = oj.options;
    var selv = parseInt(v);
    var maxv = parseInt(v) + 500;
    while (newobj.length > 0) {
        oj.remove(0);
    }
    clear(oj);
    if (selv == 0) {
        aOption = document.createElement('OPTION');
        aOption.text = '具体地区';
        aOption.value = '0';
        oj.options.add(aOption);
        return;
    } else {
        aOption = document.createElement('OPTION');
        aOption.text = '具体地区';
        aOption.value = '0';
        oj.options.add(aOption);
    }
    var str = '';
    for (i = selv + 1; i < maxv; i++) {
        if (!em_nativeplaces[i]) continue;
        aOption = document.createElement('OPTION');
        aOption.text = em_nativeplaces[i];
        aOption.value = i;
        oj.options.add(aOption);
    }
}
//子类改变事件
function ChangeSon() {
    //由于支持3级联动，所以这里需要对自己改变进行重构
    var emname = this.name.replace('_son', '');
    if (document.getElementById(emname + '_sec')) {
        var oj = document.getElementById(emname + '_sec');
    } else {
        var oj = document.createElement('select');
        oj.name = emname + '_sec';
        oj.id = emname + '_sec';
        oj.className = "form-control admin-input-sm mr-2";
        oj.onchange = ChangeSec;
    }
    var v = this.options[this.selectedIndex].value;
    document.getElementById('hidden_' + emname).value = v;
    var newobj = oj.options;
    var selarr = eval('em_' + emname + 's');
    var selv = parseInt(v);
    var maxv = parseInt(v) + 0.5;
    i = 0;
    while (newobj && newobj.length > 0) oj.remove(0);
    clear(oj);
    if (selv == 0) {
        aOption = document.createElement('OPTION');
        aOption.text = '请选择';
        aOption.value = '0';
        oj.options.add(aOption);
        return;
    } else {
        aOption = document.createElement('OPTION');
        aOption.text = '请选择';
        aOption.value = '0';
        oj.options.add(aOption);
    }
    var str = '';
    var j = 0;
    for (i = selv + 0.001; i < maxv; i = FloatAdd(i, 0.001)) {
        if (!selarr[i]) continue;
        aOption = document.createElement('OPTION');
        aOption.text = selarr[i];
        aOption.value = i;
        oj.options.add(aOption);
        j++;
    }
    if (j > 0) {
        document.getElementById('span_' + emname + '_sec').appendChild(oj);
        document.getElementById('span_' + emname + '_sec').style.display = "initial";
    } else {
        document.getElementById('span_' + emname + '_sec').innerHTML = '';
    }
}
//改变第三级的事件
function ChangeSec() {
    var emname = this.name.replace('_sec', '');
    var topSelObj = document.getElementById(emname + '_top');
    if (this.options[this.selectedIndex].value == 0) {
        document.getElementById('hidden_' + emname).value = topSelObj.options[topSelObj.selectedIndex].value;
    } else {
        document.getElementById('hidden_' + emname).value = this.options[this.selectedIndex].value;
    }
}
//顶级类改变事件
function selNextSon() {
    var emname = this.name.replace('_top', '');
    if (document.getElementById(emname + '_son')) {
        var oj = document.getElementById(emname + '_son');
    } else {
        var oj = document.createElement('select');
        oj.name = emname + '_son';
        oj.id = emname + '_son';
        oj.className = "form-control admin-input-sm mr-2";
        oj.onchange = ChangeSon;
    }
    var v = this.options[this.selectedIndex].value;
    document.getElementById('hidden_' + emname).value = v;
    if (v < 500) {
        return
    }
    var newobj = oj.options;
    var selarr = eval('em_' + emname + 's');
    var selv = parseInt(v);
    var maxv = parseInt(v) + 500;
    while (newobj && newobj.length > 0) oj.remove(0);
    clear(oj);
    if (selv == 0) {
        aOption = document.createElement('OPTION');
        aOption.text = '请选择';
        aOption.value = '0';
        oj.options.add(aOption);
        return;
    } else {
        aOption = document.createElement('OPTION');
        aOption.text = '请选择';
        aOption.value = '0';
        oj.options.add(aOption);
    }
    var str = '';
    var count = 0;
    for (i = selv + 1; i < maxv; i++) {
        if (!selarr[i]) continue;
        aOption = document.createElement('OPTION');
        aOption.text = selarr[i];
        aOption.value = i;
        oj.options.add(aOption);
        count = count + 1;
    }
    if (count > 0) {
        document.getElementById('span_' + emname + '_son').style.display = "initial";
        document.getElementById('span_' + emname + '_son').appendChild(oj);
    } else {
        document.getElementById('span_' + emname + '_son').style.display = "none";
    }
    
}
//根据数组生成多级联动菜单
function MakeTopSelect(emname, selvalue) {
    var selectFormHtml = '';
    var aOption = null;
    var selObj = document.createElement("select");
    selObj.name = emname + '_top';
    selObj.id = emname + '_top';
    selObj.className = "form-control admin-input-sm mr-2";
    selObj.onchange = selNextSon;
    var selarr = eval('em_' + emname + 's');
    var topvalue = 0;
    var sonvalue = 0;
    var secvalue = 0;
    aOption = document.createElement('OPTION');
    aOption.text = '请选择';
    aOption.value = 0;
    selObj.options.add(aOption);
    var fkey = Object.keys(selarr)[0];
    if (fkey >= 500) {
        if (selvalue % 500 == 0) {
            topvalue = selvalue;
        }
        //如果是小数,则依次取出顶级数值，二级数值以及三级数值
        else if (!!(selvalue % 1)) {
            secvalue = selvalue;
            sonvalue = Math.floor(selvalue);
            topvalue = sonvalue - (sonvalue % 500);
            //alert(secvalue);
        } else {
            sonvalue = selvalue;
            topvalue = selvalue - (selvalue % 500);
        }
        for (i = 500; i <= selarr.length; i += 500) {
            if (!selarr[i]) continue;
            aOption = document.createElement('OPTION');
            if (i == topvalue) {
                aOption = document.createElement('OPTION');
                aOption.text = selarr[i];
                aOption.value = i;
                selObj.options.add(aOption);
                aOption.selected = true;
            } else {
                aOption = document.createElement('OPTION');
                aOption.text = selarr[i];
                aOption.value = i;
                selObj.options.add(aOption);
            }
        }
        document.getElementById('span_' + emname).appendChild(selObj);
        //如果子类存在值，创建子类
        selObj = document.createElement("select");
        selObj.name = emname + '_son';
        selObj.id = emname + '_son';
        selObj.className = "form-control admin-input-sm mr-2";
        selObj.onchange = ChangeSon;
        aOption = document.createElement('OPTION');
        aOption.text = '请选择';
        aOption.value = 0;
        selObj.options.add(aOption);
        //当大类有值输出子类
        if (topvalue > 0) {
            var selv = topvalue;
            var maxv = parseInt(topvalue) + 500;
            var count = 0;
            for (i = selv + 1; i < maxv; i++) {
                if (!selarr[i]) continue;
                aOption = document.createElement('OPTION');
                if (i == sonvalue) {
                    aOption = document.createElement('OPTION');
                    aOption.text = selarr[i];
                    aOption.value = i;
                    selObj.options.add(aOption);
                    aOption.selected = true;
                } else {
                    aOption = document.createElement('OPTION');
                    aOption.text = selarr[i];
                    aOption.value = i;
                    selObj.options.add(aOption);
                }
                count = count + 1;
            }
        }
        if (count > 0) {
            document.getElementById('span_' + emname + '_son').style.display = "initial";
            document.getElementById('span_' + emname + '_son').appendChild(selObj);
        } else {
            document.getElementById('span_' + emname + '_son').style.display = "none";
        }
        //若存在第三级则创建
        if (secvalue > 0) {
            selObj = document.createElement("select");
            selObj.name = emname + '_sec';
            selObj.id = emname + '_sec';
            selObj.onchange = ChangeSec;
            aOption = document.createElement('OPTION');
            aOption.text = '请选择';
            selObj.className = "form-control admin-input-sm mr-2";
            aOption.value = 0;
            selObj.options.add(aOption);
            var selv = sonvalue;
            var maxv = parseInt(sonvalue) + 0.5;
            i = 0;
            var count = 0;
            for (i = selv + 0.001; i < maxv; i = FloatAdd(i, 0.001)) {
                if (!selarr[i]) continue;
                aOption = document.createElement('OPTION');
                if (i == secvalue) {
                    aOption = document.createElement('OPTION');
                    aOption.text = selarr[i];
                    aOption.value = i;
                    selObj.options.add(aOption);
                    aOption.selected = true;
                } else {
                    aOption = document.createElement('OPTION');
                    aOption.text = selarr[i];
                    aOption.value = i;
                    selObj.options.add(aOption);
                }
                count = count + 1;
            }
        }
        if (count > 0) {
            document.getElementById('span_' + emname + '_sec').style.display = "initial";
            document.getElementById('span_' + emname + '_sec').appendChild(selObj);
        } else {
            document.getElementById('span_' + emname + '_sec').style.display = "none";
        }
    } else {
        for (i = 0; i <= selarr.length; i += 1) {
            if (!selarr[i]) continue;
            aOption = document.createElement('OPTION');
            if (i == selvalue) {
                aOption = document.createElement('OPTION');
                aOption.text = selarr[i];
                aOption.value = i;
                selObj.options.add(aOption);
                aOption.selected = true;
            } else {
                aOption = document.createElement('OPTION');
                aOption.text = selarr[i];
                aOption.value = i;
                selObj.options.add(aOption);
            }
        }
        document.getElementById('span_' + emname).appendChild(selObj);
    }

}
//两个小数相加进度计算
function FloatAdd(arg1, arg2) {
    var r1, r2, m;
    try { r1 = arg1.toString().split(".")[1].length } catch (e) { r1 = 0 }
    try { r2 = arg2.toString().split(".")[1].length } catch (e) { r2 = 0 }
    m = Math.pow(10, Math.max(r1, r2))
    return (arg1 * m + arg2 * m) / m
}
//清除旧对象
function clear(o) {
    l = o.length;
    for (i = 0; i < l; i++) {
        o.options[1] = null;
    }
}