<!DOCTYPE html><html><body><form>Buttons:<input type="button" id="firstbtn" value="OK"><input type="button" id="secondbtn" value="OK"></form><p>Click the button below to disable the first button above.</p><button onclick="disableElement()">Disable button</button><script>function disableElement(){document.getElementById("firstbtn").disabled=true;}</script></body></html>希望本文所述对大家的javascript程序设计有所帮助。