简单的计时器 

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>计时器</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="">  
    <input type="text" name="num" size="1" value="0" /> 
     <input type="button" name="start" value="开始计时" onclick="sta();" />  
     <input type="button" name="pause" value="暂停计时" onclick="pau();" /> 
    </form>
 <script language="javascript"> 
var flag=0; 
var timeID; 
function beg(){ 
  var i=form1.num.value; 
  i++; 
  form1.num.value=i; 
 timeID=setTimeout("beg()",1000); 
} 
 function sta(){ 
  if(flag==0){ 
  beg(); 
  flag=1; 
 } 
} 
function pau(){  
 clearTimeout(timeID);  
  flag=0;  
  }
  </script> 
</body>
</html>

 

posted @ 2017-10-30 09:49  勤奋的园  阅读(249)  评论(0)    收藏  举报