实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
​x
 
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<!DOCTYPE html>
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<html>
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<head>
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<script>
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function getIndex()
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{
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var x=document.getElementById("mySelect");
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alert(x.selectedIndex);
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}
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</script>
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</head>
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<body>
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​
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<form>
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你喜欢的水果是：
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<select id="mySelect">
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  <option>Apple</option>
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  <option>Orange</option>
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  <option>Pineapple</option>
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  <option>Banana</option>
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</select>
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<br><br>
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<input type="button" onclick="getIndex()" value="弹出选中项">
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</form>
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​
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</body>
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</html>
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