下拉框连动的小例子（.htm版）
2018-09-06 12:35
<!--
var onecount;
onecount=0;
subcat = new Array();
subcat[0] = new Array(徐汇区,01,001);
subcat[1] = new Array(嘉定区,01,002);
subcat[2] = new Array(黄浦区,01,003);
subcat[3] = new Array(南昌市,02,004);
subcat[4] = new Array(九江市,02,005);
subcat[5] = new Array(上饶市,02,006);
onecount=6;
function changelocation(locationid)
{
document.myform.smalllocation.length = 0;
var locationid=locationid;
var i;
document.myform.smalllocation.options[0] = new Option(====所有地区====,);
for (i=0;i < onecount; i++)
{
if (subcat[i][1] == locationid)
{
document.myform.smalllocation.options[document.myform.smalllocation.length] = new Option(subcat[i][0], subcat[i][2]);
}
}
}
//-->
<!--
changelocation(document.myform.biglocation.options[document.myform.biglocation.selectedIndex].value);
//-->