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How to get the drop-down list value and number of elements in js

WBOY
Release： 2016-07-25 09:12:43
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例子，js获取下拉列表框元素个数。

  5. <script></li> <li>function getLength()</li> <li>{</li> <li>alert(document.getElementById("mySelect").length);//元素个数</li> <li>}</li> <li></script>
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js如何获取下拉列表值与元素个数
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