jQuery实现倒计时跳转的例子

html>
  head>
  meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
    title>跳转页面/title> 
    script src="jquery.js">/script>
    script language="javascript">!--

        $(document).ready(function() {
            function jump(count) {
                window.setTimeout(function(){
                    count--;
                    if(count > 0) {
                        $('#num').attr('innerHTML', count);
                        jump(count);
                    } else {
                        location.href="http://jb51.net";
                    }
                }, 1000);
            }
            jump(3);
        });

// -->/script>
  /head>    
  body>  
    span style="color:red">欢迎来到jb51.net！/span>br/>jb51.net页面将在3秒后跳转...br/>还剩span id="num">3/span>秒
  /body>
/html>