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[JavaScript] JS代码提取显示下拉列表框内的全部元素 →→→→→进入此内容的聊天室

来自 , 2020-10-20, 写在 JavaScript, 查看 147 次.
URL http://www.code666.cn/view/fa40b385
  1. <!DOCTYPE html>
  2. <html>
  3. <head>
  4. <script>
  5. function getOptions()
  6. {
  7. var x=document.getElementById("mySelect");
  8. var txt="All options: ";
  9. var i;
  10. for (i=0;i<x.length;i++)
  11.   {
  12.   txt=txt + "\n" + x.options[i].text;
  13.   }
  14. alert(txt);
  15. }
  16. </script>
  17. </head>
  18. <body>
  19.  
  20. <form>
  21. Select your favorite fruit:
  22. <select id="mySelect">
  23.   <option>Apple</option>
  24.   <option>Orange</option>
  25.   <option>Pineapple</option>
  26.   <option>Banana</option>
  27. </select>
  28. <br><br>
  29. <input type="button" onclick="getOptions()" value="Output all options">
  30. </form>
  31. </body>
  32. </html>
  33.  
  34. //javascript/7976

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