focus() 方法用于从下拉列表中移开焦点。
selectObject.blur()
下面的例子可设置或从下拉列表移开焦点:
<html> <head> <script type="text/javascript"> function setFocus() {document.getElementById('select1').focus()
} function loseFocus() {document.getElementById('select1').blur()
} </script> </head> <body> <form> <select id="select1"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> <br /><br /> <input type="button" onclick="setFocus()" value="Set focus" /> <input type="button" onclick="loseFocus()" value="Lose focus" /> </form> </body> </html>