JS的定时器
javascript的定时器1、setTimeout()
<script type="text/javascript">function count(){ setTimeout("alert('TOm');",1000);//暂停1秒后执行弹出框(String)}</script><input type="button" value="点击我呀"/>
2、setInterval();
<script type="text/javascript">var sec = 0;var timeId =setInterval("count();",1000);//每隔1秒执行一次function count(){ document.getElementById("num").innerHTML = sec++;}function stopCount(){ clearInterval(timeId);//清除定时器}</script><font color="red" id="num">0</font>秒钟<input type="button" value="停止"/>
例题 ：JavaScript实现5秒自动跳转到百度（计时器setInterval）
<script type="text/javascript">var jmsTimer;function loadPage(){ jmsTimer = setInterval('countDown()',1000);}var sec = 5;function countDown(){ if(sec > 0){ document.getElementById("tt").innerHTML = sec--; }else{ clearInterval(jmsTimer); location.href = "http://www.baidu.com"; }}</script><body >5秒钟后跳转百度首页</br><font color="red" id="tt">5</font></body>
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