如何限制HTML< select>中的可见选项落下？ [英] How can I limit the visible options in an HTML <select> dropdown?

问题描述

如何限制HTML < select> 下拉列表中显示的选项数？

How can I limit the number of shown options in an HTML <select> drop down?

例如：

    <select>
    <option value="1">1</option>
    <option value="2">2</option>
    ...
    <option value="20">20</option>
    </select>

如何让浏览器只显示前五个选项，向下滚动剩下的？ / p>

How can I get the browser to show only the first five options and scroll down for the rest?

推荐答案

你可以尝试这个

<select name="select1" onmousedown="if(this.options.length>8){this.size=8;}"  onchange='this.size=0;' onblur="this.size=0;">
         <option value="1">This is select number 1</option>
         <option value="2">This is select number 2</option>
         <option value="3">This is select number 3</option>
         <option value="4">This is select number 4</option>
         <option value="5">This is select number 5</option>
         <option value="6">This is select number 6</option>
         <option value="7">This is select number 7</option>
         <option value="8">This is select number 8</option>
         <option value="9">This is select number 9</option>
         <option value="10">This is select number 10</option>
         <option value="11">This is select number 11</option>
         <option value="12">This is select number 12</option>
       </select>

它为我工作

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