可调节速度的撞击

下面为效果显示区!

脚本说明:
第一步:把如下代码加入<body>区域中
<script LANGUAGE="JavaScript">

if(step==8){document.forms[0].message.value='Ping-Pong_____________|*____________Ping-Pong'}
 
if(step==9){document.forms[0].message.value='Ping-Pong_____________|___*_________Ping-Pong'}
 
if(step==10){document.forms[0].message.value='Ping-Pong_________*___|_____________Ping-Pong'}
 
if(step==11){document.forms[0].message.value='Ping-Pong_____________|______*______Ping-Pong'}
 
if(step==12){document.forms[0].message.value='Ping-Pong______*______|_____________Ping-Pong'}
 
if(step==13){document.forms[0].message.value='Ping-Pong_____________|__________*__Ping-Pong'}
 
if(step==14){document.forms[0].message.value='Ping-Pong__*__________|_____________Ping-Pong'}

if(step==15){document.forms[0].message.value='Ping-Pong_____________|_____________Ping-Pong'}
  setTimeout("anim()",speed)}
function delay(){if(speed==500){speed=10}else{speed=500}}

</script>
<form><INPUT Type="text" Name="message" Size="44"><p>
<INPUT Type="button" Value="快速/减速" onClick="delay()"></form>

第二步:把如下代码加入<body>区域中
<body bgcolor="#fef4d9" onLoad="welcometext()">