ホームページ >ウェブフロントエンド >jsチュートリアル >javascript实现省市区三级联动下拉框菜单_javascript技巧
本文实例讲述了javascript实现省市区三级联动下拉框菜单代码。分享给大家供大家参考。具体如下:
运行效果截图如下:
首先写一个静态的页面:
<!DOCTYPE html> <html> <head> <title>QQ JS省市区三级联动</title> <!-- 使用QQ的省市区数据 --> <!-- <script type="text/javascript" src="http://ip.qq.com/js/geo.js"></script> --> <script type="text/javascript" src="geo.js"></script> </head> <body onload="setup();preselect('北京市');promptinfo();"> <form name="shareip" action="" method="post"> <select class="select" name="province" id="s1"> <option></option> </select> <select class="select" name="city" id="s2"> <option></option> </select> <select class="select" name="town" id="s3"> <option></option> </select> <input id="address" name="address" type="hidden" value="" /> <input onclick="alert(promptinfo())" type="submit" value="提交" /> </form> <script> function promptinfo() { var address = document.getElementById('address').value; var s1 = document.getElementById('s1').value; var s2 = document.getElementById('s2').value; var s3 = document.getElementById('s3').value; address=""+s1+ s2 + s3; return address; } </script> </body> </html>
调用的geo.js源码:
function Dsy() { this.Items = {}; } Dsy.prototype.add = function (id, iArray) { this.Items[id] = iArray; } Dsy.prototype.Exists = function (id) { if (typeof(this.Items[id]) == "undefined") return false; return true; } function change(v) { var str = "0"; for (i = 0; i 0 || !v) { if (dsy.Exists(str)) { ar = dsy.Items[str]; for (i = 0; i