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下拉框展示树形菜单
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六七句-网页特效-导航菜单-下拉框中显示的多级树形菜单
var data = new Array();
data[0] = {id: '0',pid: '1',text: '河北'};
data[1] = {id: '1',pid: '-1',text: '中国'};
data[2] = {id: '2',pid: '6',text: '莫斯科'};
data[3] = {id: '3',pid: '0',text: '邯郸'};
data[4] = {id: '4',pid: '0',text: '石家庄'};
data[5] = {id: '5',pid: '3',text: '邯郸县'};
data[6] = {id: '6',pid: '-1',text: '俄罗斯'};
data[7] = {id: '7',pid: '1',text: '湖南'};
data[8] = {id: '8',pid: '7',text: '益阳'};
data[9] = {id: '9',pid: '8',text: '南县'};
data[10] = {id: '10',pid: '9',text: '茅草街'};
data[11] = {id: '11',pid: '10',text: '新尚'};
function TreeSelector(item, data, rootId) {
this._data = data;
this._item = item;
this._rootId = rootId;
}
TreeSelector.prototype.createTree = function() {
var len = this._data.length;
for (var i = 0; i < len; i++) {
if (this._data[i].pid == this._rootId) {
this._item.options.add(new Option(".." + this._data[i].text, this._data[i].id));
for (var j = 0; j < len; j++) {
this.createSubOption(len, this._data[i], this._data[j]);
}
}
}
}
TreeSelector.prototype.createSubOption = function(len, current, next) {
var blank = "..";
if (next.pid == current.id) {
intLevel = 0;
var intlvl = this.getLevel(this._data, this._rootId, current);
for (a = 0; a < intlvl; a++) blank += "..";
blank += "├-";
this._item.options.add(new Option(blank + next.text, next.id));
for (var j = 0; j < len; j++) {
this.createSubOption(len, next, this._data[j]);
}
}
}
TreeSelector.prototype.getLevel = function(datasources, topId, currentitem) {
var pid = currentitem.pid;
if (pid != topId) {
for (var i = 0; i < datasources.length; i++) {
if (datasources[i].id == pid) {
intLevel++;
this.getLevel(datasources, topId, datasources[i]);
}
}
}
return intLevel;
}
var ts = new TreeSelector(document.getElementById("myselect"), data, -1);
ts.createTree();
/wm_at163/blog/static/13217349062574052677/
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