2015-10-17 85 views

回答

0

嘗試這樣:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> 
 
<!DOCTYPE html> 
 
<html> 
 
<head> 
 
<style> 
 
body { 
 
    width: 200px; 
 
    height: 100px; 
 
    overflow: scroll; 
 
} 
 
</style> 
 
</head> 
 
<body > 
 

 
<p>Try the scrollbar in div.</p> 
 

 
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since. 
 
<br><br> 
 
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.' 
 

 

 
<p>Try the scrollbar in div.</p> 
 

 
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since. 
 
<br><br> 
 
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.' 
 

 

 

 
<p>Try the scrollbar in div.</p> 
 

 
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since. 
 
<br><br> 
 
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.' 
 

 

 

 
<p>Try the scrollbar in div.</p> 
 

 
In my younger and more vulnerable years my father gave me some advice that I've been turning over in my mind ever since. 
 
<br><br> 
 
'Whenever you feel like criticizing anyone,' he told me, just remember that all the people in this world haven't had the advantages that you've had.' 
 

 
<p>Scrolled <span id="demo">0</span> times.</p> 
 

 
<script> 
 

 

 
var lastScrollTop = 0; 
 
var x = 0; 
 
$(window).scroll(function(event){ 
 
    var st = $(this).scrollTop(); 
 
    if (st > lastScrollTop){ 
 
\t document.getElementById("demo").innerHTML = x += 1; 
 
\t  if(x%3 == 0){ 
 
\t  \t var i=document.createElement('button'); 
 
\t  \t i.innerHTML="more"; 
 
\t  document.getElementsByTagName('body')[0].appendChild(i); 
 
\t  } 
 
    } 
 
    lastScrollTop = st; 
 
}); 
 
</script> 
 

 
</body> 
 
</html>