javascript 09年最新版的省市联动_表单特效

<select id="province" onchange="setCity(this.value);getArea()" name="province"><option value="" selected>请选择</option></select><select id="city" onchange="setCounty(this.value);getArea()" name="city" style="display:;"><option value="" selected>请选择</option></select><select id="county" name="county" onchange="getArea()" style="display:;"><option value="" selected>请选择</option></select><input type="text" name="area" id="area" value="222426" onchange="setArea();"><input type="button" value="转" onclick="setArea();">

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