var subval2 = new Array();
//数组结构：一级根值,二级根值,二级显示值


subval2[0] = new Array('12','13','尼亚')


var subval3 = new Array();
//数组结构：二级根值,三级根值,三级显示值


subval3[0] = new Array('12','13','尼亚')


function changeselect1(locationid)
{
    document.myform.Uprovince.length = 0;
    document.myform.Uprovince.options[0] = new Option('-----请选择-----','0');
    document.myform.Uselect.length = 0;
    document.myform.Uselect.options[0] = new Option('-----请选择-----','0');
    for (i=0; i<subval2.length; i++)
    {
        if (subval2[i][0] == locationid)
        {document.myform.Uprovince.options[document.myform.Uprovince.length] = new Option(subval2[i][2],subval2[i][1]);}
    }
}

function changeselect2(locationid)
{
    document.myform.Uselect.length = 0;
    document.myform.Uselect.options[0] = new Option('-----请选择-----','0');
    for (i=0; i<subval3.length; i++)
    {
        if (subval3[i][0] == locationid)
        {document.myform.Uselect.options[document.myform.Uselect.length] = new Option(subval3[i][2],subval3[i][1]);}
    }
}