* setInterval clearInterval * 用法

代码

< html  xmlns ="http://www.w3.org/1999/xhtml" >
< head >
< title > runcode </ title >
< meta  http-equiv ="Content-Type"  content ="text/html; charset=utf-8"   />
< meta  name ="Author"  content ="Sheneyan"   />
< script  language ="javascript"  src ="http://jqueryjs.googlecode.com/files/jquery-1.3.min.js" ></ script >
< script  type ="text/javascript" >

/* *
 *  时钟
 *  setInterval clearInterval
 *  用法
 * */

     var  i;
    $(document).ready( function () {
     i =  setInterval(updateSeconds,  10 ); 
    });

     function  updateSeconds() {
         var  divs  =   new  Date();
         if  (divs.getSeconds()  ==   0 ) {
            clearInterval(i);
        }
        jQuery( " #timediv " ).html(divs.getHours()  + "   " +  divs.getMinutes()  + "   " +  divs.getSeconds());

    }
</ script >
</ head >
< body >
< div  id ="timediv" ></ div >  
</ body >
</ html >