<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> <script type="text/javascript"> var count = 10; var tmrid= setInterval("setvalue()", 1000); event.cancelBubble=true function setvalue() { var btn = document.getElementById("btn"); if (count > 0) { btn.value = "等待" + count + "秒"; count--; btn.disabled = true; } else { btn.value = "同意" clearInterval("tmrid"); btn.disabled = false; } } </script> </head> <body> <form id="form1" runat="server"> <div> <input id="btn" type="button" value="同意" /> </div> </form> </body> </html>