JavaScript圆形虚幻(羽化)效果_图片特效特效

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JavaScript圆形虚幻效果，跟PS里面的羽化效果有点像。

<html>
<head>
<meta http-equiv="Content-Type" mrc="text/html; charset=gb2312">
<title>圆形羽化效果</title>
</head>
<body onload=setValues()>
<center>
<SCRIPT language=JavaScript>
<!-- Beginning of JavaScript -
var x,y
var marginbottom
var marginleft=0
var margintop=0
var marginright
var cliptop
var clipbottom
var clipleft
var clipright
var clippoints
var ballheight=150
var ballwidth=150
var imageheight=525
var imagewidth=457
var tempo=25
var stepx=12
var stepy=6
var timer
function setValues() {
	if (document.all) {
    	marginbottom = imageheight-ballheight
    	marginright = imagewidth-ballwidth
		document.all.ball.style.posLeft=randommaker(400)
   		document.all.ball.style.posTop=0
		document.all.textmrc.style.posLeft=0
   		document.all.textmrc.style.posTop=0
		document.all.ball.style.filter="alpha(opacity=0,finishopacity=100,style=2,startX=0px,startY=0px,finishX=100px,finishY=100px)"
    	moveball()
	}

}

function randommaker(range) {		
rand=Math.floor(range*Math.random())
    return rand
}
function moveball() {
	checkposition()
	if (document.all) {	
   		document.all.ball.style.posLeft+=stepx
   		document.all.ball.style.posTop+=stepy
		cliptop=document.all.ball.style.posTop
		clipbottom=cliptop+ballheight
		clipleft=document.all.ball.style.posLeft
		clipright=clipleft+ballwidth
		clippoints="rect("+cliptop+" "+clipright+" "+clipbottom+" "+clipleft+")"
		document.all.textmrc.style.clip=clippoints
    	timer=setTimeout("moveball()",tempo)

}
}

function checkposition() {
	if (document.all) {
		if (document.all.ball.style.posLeft>=marginright) {
			stepx=stepx*-1
			document.all.ball.style.posLeft-=10
		}

if (document.all.ball.style.posLeft<=marginleft) {
			stepx=stepx*-1
			document.all.ball.style.posLeft+=10
		}

if (document.all.ball.style.posTop>=marginbottom) {
			stepy=stepy*-1
			document.all.ball.style.posTop-=10
		}

if (document.all.ball.style.posTop<=margintop) {
			stepy=stepy*-1
			document.all.ball.style.posTop+=10
		}
	}
}

// - End of JavaScript - -->

</SCRIPT>
<span id=textmrc style="LEFT: -5000px; POSITION: absolute; TOP: -2000px"><IMG
border=0 src="/jscss/demoimg/wall8.jpg"> </span>
<span id=ball style="BACKGROUND-COLOR: white; HEIGHT: 150px; POSITION: absolute; TOP: -50px; WIDTH: 150px"></span>
</center>
</body>
</html>

所属频道：图片特效特效/更新时间：2012-12-17

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JavaScript圆形虚幻(羽化)效果_图片特效特效

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