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CSS3 ????? ?? ??

CSS3? animation-duration ??? ?? ??? ??:
? ??? ????? ?????? ?? ??? ???? ? ?????.
????? ??? ?? ??? ??? CSS3? ????? ?? ???? ?? ??? ??? ?????.
?? ??:

animation-duration:<time> [ ,<time>]*

???? ??:
time: ????? ?? ??? ???? ??? ?(s)???.
?? ?? ??:
?? ?? ?? ???? ?? ??? ?????.
?? ???? ??? animationDuration???.

?? ?:
? 1:

<!DOCTYPE html>  
<html>  
<head>  
<meta charset=" utf-8">  
<meta name="author" content="http://ipnx.cn/" />  
<title>php中文網(wǎng)</title> 
<style type="text/css"> 
div{
  width:100px;
  height:100px;
  background:red;
  position:relative;
     
  animation:theanimation infinite alternate;
  -webkit-animation:theanimation infinite alternate ;
  -moz-animation:theanimation infinite alternate ;
  -o-animation:theanimation infinite alternate ;
  -ms-animation:theanimation infinite alternate ;
   
  -webkit-animation-duration:8s;
  -moz-animation-duration:8s;
  -o-animation-duration:8s;
  -ms-animation-duration:8s;
  animation-duration:8s;
}
@keyframes theanimation{
  0%{top:0px;left:0px;background:red;}
  25%{top:0px;left:100px;background:blue;}
  50%{top:100px;left:100px;background:yellow;}
  75%{top:100px;left:0px;background:green;}
  100%{top:0px;left:0px;background:red;}
}
@-moz-keyframes theanimation{
  0% {top:0px;left:0px;background:red;}
  25%{top:0px;left:100px;background:blue;}
  50%{top:100px;left:100px;background:yellow;}
  75%{top:100px;left:0px;background:green;}
  100%{top:0px;left:0px;background:red;}
}
@-webkit-keyframes theanimation{
  0%{top:0px;left:0px;background:red;}
  25%{top:0px;left:100px;background:blue;}
  50%{top:100px;left:100px;background:yellow;}
  75%{top:100px;left:0px;background:green;}
  100%{top:0px;left:0px;background:red;}
}
@-o-keyframes theanimation{
  0%{top:0px;left:0px;background:red;}
  25%{top:0px;left:100px;background:blue;}
  50%{top:100px;left:100px;background:yellow;}
  75%{top:100px;left:0px;background:green;}
  100%{top:0px;left:0px;background:red;}
}
</style>
</head>
<body>
<div></div>
</body>
</html>

? ??? ????? ?? ??? 8?? ?????.
? 2:

<!DOCTYPE html>   
<html>   
<head>   
<meta charset=" utf-8">   
<meta name="author" content="http://ipnx.cn/" />   
<title>php中文網(wǎng)</title>  
<style type="text/css">  
div{ 
  width:100px; 
  height:100px; 
  background:red; 
  position:relative; 
       
  animation:firstanimation infinite alternate,secondanimation infinite alternate; 
  -webkit-animation:firstanimation infinite alternate,secondanimation infinite alternate; 
  -moz-animation:firstanimation infinite alternate,secondanimation infinite alternate; 
  -o-animation:firstanimation infinite alternate,secondanimation infinite alternate; 
  -ms-animation:firstanimation infinite alternate,secondanimation infinite alternate;
    
  -webkit-animation-duration:5s,2s;  
  -moz-animation-duration:5s,2s;  
  -o-animation-duration:5s,2s;  
  -ms-animation-duration:5s,2s;    
  animation-duration:5s,2s;  
}
@keyframes firstanimation{ 
  0% {left:0px;} 
  100% {left:200px;} 
} 
@-webkit-keyframes firstanimation{ 
  0% {left:0px;} 
  100% {left:200px;} 
} 
@-moz-keyframes firstanimation{ 
  0% {left:0px;} 
  100% {left:200px;} 
} 
@-o-keyframes firstanimation{ 
  0% {left:0px;} 
  100% {left:200px;} 
} 
@-ms-keyframes firstanimation{ 
  0% {left:0px;} 
  100% {left:200px;} 
}
@keyframes secondanimation{ 
  0% {top:0px;} 
  100% {top:200px;} 
} 
@-webkit-keyframes secondanimation{ 
  0% {top:0px;} 
  100% {top:200px;} 
} 
@-moz-keyframes secondanimation{ 
  0% {top:0px;} 
  100% {top:200px;} 
} 
@-o-keyframes secondanimation{ 
  0% {top:0px;} 
  100% {top:200px;} 
} 
@-ms-keyframes secondanimation{ 
  0% {top:0px;} 
  100% {top:200px;} 
} 
</style> 
</head> 
<body> 
<div></div> 
</body> 
</html>

? ??? animation-duration? ???? ? ?????? ?? ?? ? ?? ????? ??? ?????.


???? ??
||
<!DOCTYPE html> <html> <head> <meta charset=" utf-8"> <meta name="author" content="http://ipnx.cn/" /> <title>php中文網(wǎng)</title> <style type="text/css"> div{ width:100px; height:100px; background:red; position:relative; animation:theanimation infinite alternate; -webkit-animation:theanimation infinite alternate ; -moz-animation:theanimation infinite alternate ; -o-animation:theanimation infinite alternate ; -ms-animation:theanimation infinite alternate ; -webkit-animation-duration:8s; -moz-animation-duration:8s; -o-animation-duration:8s; -ms-animation-duration:8s; animation-duration:8s; } @keyframes theanimation{ 0%{top:0px;left:0px;background:red;} 25%{top:0px;left:100px;background:blue;} 50%{top:100px;left:100px;background:yellow;} 75%{top:100px;left:0px;background:green;} 100%{top:0px;left:0px;background:red;} } @-moz-keyframes theanimation{ 0% {top:0px;left:0px;background:red;} 25%{top:0px;left:100px;background:blue;} 50%{top:100px;left:100px;background:yellow;} 75%{top:100px;left:0px;background:green;} 100%{top:0px;left:0px;background:red;} } @-webkit-keyframes theanimation{ 0%{top:0px;left:0px;background:red;} 25%{top:0px;left:100px;background:blue;} 50%{top:100px;left:100px;background:yellow;} 75%{top:100px;left:0px;background:green;} 100%{top:0px;left:0px;background:red;} } @-o-keyframes theanimation{ 0%{top:0px;left:0px;background:red;} 25%{top:0px;left:100px;background:blue;} 50%{top:100px;left:100px;background:yellow;} 75%{top:100px;left:0px;background:green;} 100%{top:0px;left:0px;background:red;} } </style> </head> <body> <div></div> </body> </html>