发个小东西

 <form id="form1" name="form1" method="post" action="">
<input type="submit" name="Submit" value="同意" />
</form>
<script language="javascript">
document.form1.Submit.disabled = true;
var speed = 1000; //速度
var wait = 10; //停留时间
function updateinfo(){
if(wait == 0){
    document.form1.Submit.value = "我同意";
    document.form1.Submit.disabled = false;
}
else{
    document.form1.Submit.value = "阅读条款"+wait;
    wait--;
    window.setTimeout("updateinfo()",speed);
}
}
updateinfo();
</script>