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省份城市联动框

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<!DOCTYPE html><html><head>    <meta charset="utf-8">    <script type="text/javascript">                function showCitys(){            var allCity = [[],["广州","深圳"],["南宁","桂林","我不住地"]];            var allProvice = document.getElementById("allProvice");            //获取选择的省份            var i = parseInt(allProvice.selectedIndex);            //取出这个省份中的城市            var data = allCity[i];            //填入到            var citys = document.getElementById("citys");            citys.options.length = 1;            var optionNode = document.createElement("option");            for(var i = 0 ; i < data.length ; i++){                var optionNode = document.createElement("option");                optionNode.innerHTML = data[i];                citys.appendChild(optionNode);            }        }    </script>    <title></title></head><body>        省份    <select name="" id="allProvice" onchange="showCitys()">        <option value="">省份</option>        <option value="">广东</option>        <option value="">广西</option>    </select>    城市    <select name="" id="citys" >        <option>城市</option>    </select>    </body></html>

 

省份城市联动框