Javascript 生成无限下拉列表实现代码_javascript技巧

//公司二维数组数据源
Office = [
["Dept", "ParentDept"],
["业务部", "0"],
["技术部", "0"],
["市场部", "0"],
["www.yongfa365.com", "业务部"],
["业务部小杨", "业务部"],
["业务部小菜", "业务部"],
["技术部老柳", "技术部"],
["技术部老杨", "技术部"],
["技术部老菜", "技术部"],
["市场部柳先生", "市场部"],
["市场部杨先生", "市场部"],
["市场部菜鸟", "市场部"]
]

//省市三维数组数据源
City3 = [
["Dept", "ParentId", "Id"],
["北京", "0", "010"],
["山西", "0", "0359"],
["朝阳区", "010", "001"],
["海淀区", "010", "002"],
["豆各庄", "001", "101"],
["十里堡", "001", "102"],
["中关村", "002", "201"],
["上地", "002", "202"],
["运城地区", "0359", "301"],
["太原市", "0359", "302"],
["永济市", "301", "311"],
["小区", "302", "312"]
];

//FillSelectTree("nowhaha", City3, "0", "311", -1)
//Select控件ID,数据源,父级值,选中值,第几级（用来产生分隔符）
function FillSelectTree(SelectId, ArrObj, ParentValue, SelectedValue, NowI) {
StrObj = eval(document.getElementById(SelectId));

NowI++;

//判断它是二级数据源，还是三级
if (ArrObj[0].length == 2)
{ ArrNum = 0; }
else
{ ArrNum = 2; }

//生成所有Option
for (var i = 0; i if (ArrObj[i][1] == ParentValue) {
StrObj.options[StrObj.length] = new Option(String("　　", NowI) + ArrObj[i][0], ArrObj[i][ArrNum]);

//选中默认值
if (ArrObj[i][ArrNum] == SelectedValue) {
StrObj.options[StrObj.length - 1].selected = true;
}

//遍历
FillSelectTree(SelectId, ArrObj, ArrObj[i][ArrNum], SelectedValue, NowI);
}
}
}


//复制字符串多少次
function String(str, nowi) {
strtemp = "";
for (var i = 0; i strtemp += str;
}
return strtemp;
}

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title></title> <hr> <select id="nowhaha"></select><select id="NowOffice"></select>
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]