js写的二级级联选项框



请选择省名


请选择城名


<!-- &nbsp;&nbsp; <br />var&nbsp; city1&nbsp; =&nbsp; ["杭州",&nbsp; "宁波",&nbsp; "温州",&nbsp; "绍兴",&nbsp; "金华",&nbsp; "湖州"];&nbsp;&nbsp; <br />var&nbsp; city2&nbsp; =&nbsp; ["南京",&nbsp; "苏州",&nbsp; "无锡",&nbsp; "常州",&nbsp; "镇江",&nbsp; "徐州"];&nbsp;&nbsp; <br />var&nbsp; city3&nbsp; =&nbsp; ["合肥",&nbsp; "翕县",&nbsp; "黄山",&nbsp; "祁门",&nbsp; "休宁"];&nbsp;&nbsp; <br />var&nbsp; city4&nbsp; =&nbsp; ["南昌",&nbsp; "九江",&nbsp; "赣州",&nbsp; "上饶",&nbsp; "新余",&nbsp; "景德镇"];&nbsp;&nbsp;&nbsp; <br />var&nbsp; provinceName&nbsp; =&nbsp; ["浙江",&nbsp; "江苏",&nbsp; "安徽",&nbsp; "江西"];&nbsp;&nbsp; <br />function&nbsp; province()&nbsp;&nbsp; <br />{&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var&nbsp; e&nbsp; =&nbsp; document.form1.province;&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for&nbsp; (var&nbsp; i=0;&nbsp; i <provinceName.length;&nbsp; i++)&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; e.options.add(new&nbsp; Option(provinceName[i],&nbsp; provinceName[i]));&nbsp;&nbsp; <br />}&nbsp;&nbsp; <br />function&nbsp; cityName(n)&nbsp;&nbsp; <br />{&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var&nbsp; e&nbsp; =&nbsp; document.form1.city;&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for&nbsp; (var&nbsp; i=e.options.length;&nbsp; i>0;&nbsp; i )&nbsp;&nbsp;&nbsp; e.remove(i);&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if&nbsp; (n&nbsp; ==&nbsp; 0)&nbsp; return;&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var&nbsp; a&nbsp; =&nbsp; eval("city"+&nbsp; n);&nbsp; //得到城市的数组名&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for&nbsp; (var&nbsp; i=0;&nbsp; i<a.length;&nbsp; i++)&nbsp; e.options.add(new&nbsp; Option(a[i],&nbsp; a[i]));&nbsp;&nbsp; <br />}&nbsp;&nbsp; <br />function&nbsp; window.onload()&nbsp;&nbsp; <br />{&nbsp;&nbsp; <br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; province();&nbsp; //初始时给省名下拉菜单赋内容&nbsp;&nbsp; <br />}&nbsp;&nbsp; <br /> // -->