页面中获取值并判断的js如下:
<script type="text/javascript">
//这个函数是必须的,因为在area.js里每次更改地址时会调用此函数
function promptinfo()
{
var address = document.getElementById('address');
var s1 = document.getElementById('s1');
var s2 = document.getElementById('s2');
var town1 = document.getElementById('town1');
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