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<!DOCTYPE html> <html> <body> <select id="mySelect" size="1"> <option>Cat</option> <option>Dog</option> <option>Horse</option> <option>Elephant</option> <option>Mouse</option> <option>Fish</option> <option>Cow</option> </select> <p>Click the button to change the number of visible options in the dropdown list.</p> <button onclick="myFunction()">Try it</button> <script> function myFunction() { document.getElementById("mySelect").size = "4"; } </script> </body> <!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_select_size2 by HTTrack Website Copier/3.x [XR&CO'2014], Fri, 23 Jan 2015 08:34:56 GMT --> </html>
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