JS实现的DIV块来回滚动效果示例
风起从容 人气:0本文实例讲述了JS实现的DIV块来回滚动效果。分享给大家供大家参考,具体如下:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <div id="xx" style=" position:relative;left:100px;width:100px;height:50px;border: solid 1px red;"></div> <script type="text/javascript"> function ls(){ var p=true;//开关,true开,false关 var xx=document.getElementById('xx'); var xxleft = parseInt(xx.style.left); var speed = 20; var t=setInterval(rollRight,speed); //向左移动 function rollLeft(){ if(p){ xxleft--; xx.style.left = xxleft+'px'; if(xxleft <=0 ){ clearInterval(t); t=setInterval(rollRight,speed); } } } //向右移动 function rollRight(){ if(p){ xxleft++; xx.style.left = xxleft+'px'; if(xxleft >= 300){ clearInterval(t); t=setInterval(rollLeft,speed); } } } } ls(); </script> </body> </html>
运行效果图如下:
希望本文所述对大家JavaScript程序设计有所帮助。
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