How can I limit the visible options in an HTML <select> dropdown?

Question

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

For example:

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

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

Answer 1

You can try this

<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>

It worked for me