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JS Collision Motion

Source: Internet
Author: User
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<!DOCTYPE HTML Public "-//W3C//DTD XHTML 1.0 transitional//en" "http://www.w3.org/TR/xhtml1/DTD/ Xhtml1-transitional.dtd "><HTMLxmlns= "http://www.w3.org/1999/xhtml"><Head>    <title>Collision Motion</title>    <style>#div1{width:100px;Height:100px;background:Red;position:Absolute;        }    </style>        <Scripttype= "Text/javascript">window.onload= function(){            varobtn=document.getElementById ("btn"); Obtn.onclick= function() {move (); }                }                    varTimer= NULL; varSpeedx= 6; varSpeedY= 8; functionMove () {clearinterval (timer); Timer=SetInterval (function(){                                varOdiv=document.getElementById ("Div1"); varL=Odiv.offsetleft+Speedx; varT=Odiv.offsettop+SpeedY; if(t>=Document.documentElement.clientHeight-odiv.offsetheight) {SpeedY*=-1; T=Document.documentElement.clientHeight-Odiv.offsetheight; }                Else if(t<=0) {SpeedY*=-1; T=0; }                                if(L>=Document.documentElement.clientWidth-odiv.offsetwidth) {Speedx*=-1; L=Document.documentElement.clientWidth-Odiv.offsetwidth; }                Else if(L<=0) {Speedx*=-1; L= 0; } oDiv.style.left=L+'px'; ODiv.style.top=T+'px'; }, -); }    </Script></Head><Body>   <inputtype= "button"ID= "BTN"value= "movement" />   <DivID= "Div1">    </Div>    <spanstyle= "width:1px;height:300px;background:black;left:300px"></span></Body></HTML>

JS Collision Motion

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