撞壁自动变换的图片效果-JS特效-爱易网页

撞壁自动变换的图片效果

日期：2014-05-18　浏览次数：20171 次

欢迎光临爱易网网页脚本特效中心，点击运行按钮演示特效：

以下是程序代码

<title>爱易网网页特效演示，撞壁自动变换的图片效果</title>
</head>

<SCRIPT>
var x,y
var marginbottom
var marginleft=0
var margintop=0
var marginright

// 速度，越小越快
var tempo=60

// 单位时间内水平移动的距离
var stepx=20

// 单位时间内上下移动的距离
var stepy=20
var timer

// 图象的路径
img0 = new Image();
img0.src = "http://www.aiyiweb.com/images/face/image21.gif";
img1 = new Image();
img1.src = "http://www.aiyiweb.com/images/face/image21.gif";
img2 = new Image();
img2.src = "http://www.aiyiweb.com/images/face/image21.gif";
img3 = new Image();
img3.src = "http://www.aiyiweb.com/images/face/image21.gif";
// 延迟两秒开始运动
function setValues() {
var firsttimer= setTimeout("setValues2()",100)}

function setValues2() {
	if (document.all) {
	marginbottom = document.body.clientHeight-50
	marginright = document.body.clientWidth-50
		document.all.ball.style.posLeft=randommaker(marginright-30)+30
		document.all.ball.style.posTop=10
	moveball()
	}
	if (document.layers) {
	marginbottom = window.innerHeight-10
	marginright = window.innerWidth-10
		document.ball.left=randommaker(marginright-30)+30
		document.ball.top=10
	moveball()
	}
}

function randommaker(range) {		
	rand=Math.floor(range*Math.random())
return rand
}

function moveball() {
	checkposition()
	chooseimage()
	if (document.all) {	
		document.all.ball.style.posLeft+=stepx
		document.all.ball.style.posTop+=stepy
	timer=setTimeout("moveball()",tempo)
	}
	if (document.layers) {
		document.ball.left+=stepx
		document.ball.top+=stepy
	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
		}
	}
	if (document.layers) {
		if (document.ball.left>=marginright) {
			stepx=stepx*-1
			document.ball.left-=10
		}
		if (document.ball.left<=marginleft) {
			stepx=stepx*-1
			document.ball.left+=10
		}	
		if (document.ball.top>=marginbottom) {
			stepy=stepy*-1
			document.ball.top-=10
		}
		if (document.ball.top<=margintop) {
			stepy=stepy*-1
			document.ball.top+=10
		}
	}
}

function chooseimage() {
	if (document.all) {
		if (stepx <= 0 && stepy <=0) {ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
		if (stepx >= 0 && stepy <=0) {ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
		if (stepx <= 0 && stepy >=0) {ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
		if (stepx >= 0 && stepy >=0) {ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
	}
	
	if (document.layers) {
		if (stepx <= 0 && stepy <=0) {document.ball.document.ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
		if (stepx >= 0 && stepy <=0) {document.ball.document.ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
		if (stepx <= 0 && stepy >=0) {document.ball.document.ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}
if (stepx >= 0 && stepy >=0) {document.ball.document.ballimage.src="http://www.aiyiweb.com/images/face/image21.gif"}}}
</SCRIPT>

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