JS简单实现城市二级联动选择插件的方法_javascript技巧

var citys=new Array(
new Array("南京","淮安","扬州","常州",'其它'),
new Array("北京"),
new Array("天津"),
new Array("上海"),
new Array("其它")
);
function scity(pname,cname){
var province=['江苏省','北京','天津','上海','其它'];
document.write('');
document.write('--选择省份--')
for(var i=0;i'+province[i]+'');
}
document.write('');
document.write('');
document.write('--选择城市--');
document.write('');
selectc(document.getElementById("pro"));
}
function selectc(pobj){
 var index=pobj.selectedIndex-1;
 var cobj=document.getElementById("city");
 cobj.innerHTML='';
 if(index>=0){
 for(var i=0;i