<input type="text" name="name" value="http://www.mamicode.com/0" id="txt" />
<script type="text/javascript">        window.onload = function () {            setInterval(function () {                //获取文本框对象                var obj = document.getElementById(‘txt‘);                //获取value值                var txtvalue =http://www.mamicode.com/ parseInt(obj.value);                obj.value = txtvalue = http://www.mamicode.com/txtvalue + 1;            },1000);        }    </script>

function f1() {    alert(‘嘎嘎‘);} //计时器,返回值是该计时器的id var setId = window.setInterval(f1, 2000);//清除计时器方法,参数是一个计时器的id,清除计时器 window.clearInterval(setId);

//这个计时器就执行一次var setId= setTimeout(function () {    alert(‘加载了‘);}, 1000);clearTimeout(setId);//清除计时器

<input type="button" name="name" value="向左走" id="btnLeft" />    <input type="button" name="name" value="向右走" id="btnRight" />

<script type="text/javascript">        var def = ‘left‘;        function f1() {            def = ‘left‘;        }        function f2() {            def = ‘right‘;        }        window.onload = function () {            setInterval(function () {                //获取标题内容                var tit = document.title;                if (def == ‘left‘) {                    document.title = tit.substr(1) + tit.charAt(0);                } else if (def == ‘right‘) {                    document.title = tit.charAt(tit.length - 1) + tit.substr(0, tit.length - 1);                }            }, 1000);            document.getElementById(‘btnLeft‘).onclick = f1;            document.getElementById(‘btnRight‘).onclick = f2;        };    </script>