省份,城市，区县数据结构：【名称，父类ID,当前ID】

onChange="changelocation2(document.editForm.smalllocation.options[document.editForm.smalllocation.selectedIndex].value)"

根据selectedIndex取得下一级关联菜单的父类ID,

复制代码 代码如下:

function changelocation(locationid)

{

document.editForm.smalllocation.length = 0;

// document.editForm.dlmc0.length = 0;

document.getElementById("dlmc0").length=0;

//document.editForm.dlmc0.options[0] = new Option('==请选择==','');

document.getElementById("dlmc0").options[0] = new Option('==请选择==','');

//alert(locationid);

var locationid=locationid;

var i;

document.editForm.smalllocation.options[0] = new Option('==请选择==','');

for (i=0;i < onecount; i++)

{

if (subcat[i][1] == locationid)

{

document.editForm.smalllocation.options[document.editForm.smalllocation.length] = new Option(subcat[i][0], subcat[i][2]);

}

}

}