求一递归函数！

Question

数据如下：
一个下拉控件：
name="EconType
选项：iCount=0;
arrData= new Array();
arrData[iCount++] = new Array("选项1","100","-1")
arrData[iCount++] = new Array("选项1-1","110","100")
arrData[iCount++] = new Array("选项1-1-1","111","110")
arrData[iCount++] = new Array("选项2","200","-1")
arrData[iCount++] = new Array("选项2-1","210","200")
arrData[iCount++] = new Array("选项2-1-1","211","210")