倒计时自动提交的问题。

Question

考试系统中，倒计时时间到了以后，会弹出对话框提示时间到。
怎么样实现：点击对话框的确定按钮，就自动提交。也就是激发提交试卷的按钮事件！~

Answer 1

用timer控件也可以~~~~
这是vs2008的ajax控件当然用javascript也可以吧,但是那是居于客户端的..考试系统的计时应该是基于服务器才行吧.不然可能每个人考试交卷的时间都不同,考试开考了迟到时间没好补回来吧

Answer 2

用 JS 很好做 
 <script type="text/javascript">
                        var secs = 6;
                        var wait = secs * 1000;
                        document.getElementById("agree").value = "同 意(" + secs + ")";
                        document.getElementById("agree").disabled = true;
                        for(i = 1; i <= secs; i++){
                                window.setTimeout("update(" + i + ")", i * 1000);
                        }
                        window.setTimeout("timer()", wait);
                        function update(num, value) {
                                if(num == (wait/1000)){
                                        document.getElementById("agree").value = "同 意";
                                } else{
                                        printnr = (wait / 1000) - num;
                                        document.getElementById("agree").value = "同 意(" + printnr + ")";
                                }
                        }
                        function timer(){
                                document.getElementById("agree").disabled = false;
                                document.getElementById("agree").value = "同   意";
                        }
                        </script>