settimeout()

    在javascript給事件定時很容易。其關(guān)鍵指令是settimeout()和cleartimeout()方法。利用settimeout(), 指令可以在未來的某個指定時間執(zhí)行特定指令。如果你改變主意，你可以用cleartimeout()取消settimeout的定時. 下面是settimeout的基本格式：
    var the_timeout = settimeout(some javascript
    statement, some_number_of_milliseconds);
    在上面的例子中用到的指令如下：
    var the_timeout = settimeout(alertandredirect ();,3000);
    <form name=the_form >
    <input type=text name=the_text />
    </form>
    <script language=javascript>
    <!--
    function dodumbtimer()
    {
    var timer1 = settimeout(document.the_form.the_text.value='3 seconds!';,3000);
    var timer2 = settimeout(document.the_form.the_text.value='6 seconds!';,6000);
    var timer3 = settimeout(document.the_form.the_text.value='9 seconds!';,9000);
    }
    dodumbtimer();
    -->
    </script>