有意思的图片组合飞入效果，本代码将多张GIF图片按一定方向组合在一起，由两个方向向一个方向组合，需要多张图片，但最终效果挺好，以前不怎么见到过，发上来分享给JS爱好者，请预览看效果吧。
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>河北草坪</title>
</head>
<body onload=changeimage()>
<STYLE>
.spanstyle {
LEFT: -5000px; POSITION: absolute
}
</STYLE>
<SCRIPT>
var imgwidth=200
var imgheight=90
var imgurl=new Array()
imgurl[0]="/jscss/demoimg/201303/1.gif"
imgurl[1]="/jscss/demoimg/201303/5.gif"
imgurl[2]="/jscss/demoimg/201303/6.gif"
var imgpreload=new Array()
for (i=0;i<=imgurl.length-1;i++) {
imgpreload[i]=new Image()
imgpreload[i].src=imgurl[i]
}
var x_finalpos=300
var y_finalpos=200
var x_slices=8
var y_slices=3
var pause=10
var screenwidth=800
var screenheight=500
var x_step=new Array()
var y_step=new Array()
var x_randompos=0
var y_randompos=0
var i_loop=0
var max_loop=20
var i_image=0
var width_slice=Math.floor(imgwidth/x_slices)
var height_slice=Math.floor(imgheight/y_slices)
var cliptop=0
var clipbottom=height_slice
var clipleft=0
var clipright=width_slice
var spancounter=0
function initiate() {
cliptop=0
clipbottom=height_slice
clipleft=0
clipright=width_slice
i_loop=0
spancounter=0
if (document.all) {
for (i=0;i<=y_slices-1;i++) {
for (ii=0;ii<=x_slices-1;ii++) {
var thisspan=eval("document.all.span"+spancounter+".style")
x_randompos=Math.ceil(screenwidth*Math.random())
y_randompos=Math.ceil(screenheight*Math.random())
thisspan.posLeft=x_randompos
thisspan.posTop=y_randompos
thisspan.clip ="rect("+cliptop+" "+clipright+" "+clipbottom+" "+clipleft+")"
clipleft+=width_slice
clipright+=width_slice
spancounter++
}
clipleft=0
clipright=width_slice
cliptop+=height_slice
clipbottom+=height_slice
}
}
explode_IE()
}
function changeimage() {
spancounter=0
for (i=0;i<=y_slices-1;i++) {
for (ii=0;ii<=x_slices-1;ii++) {
var thisspan=eval("document.all.span"+spancounter+".style")
thisspan.posLeft=-5000
thisspan.posTop=-5000
spancounter++
}
}
spancounter=0
if (i_image>imgurl.length-1) {i_image=0}
for (i=0;i<=y_slices-1;i++) {
for (ii=0;ii<=x_slices-1;ii++) {
var thisinnerspan=eval("span"+spancounter)
thisinnerspan.innerHTML="<img src=‘"+imgurl[i_image]+"‘>"
spancounter++
}
}
i_image++
initiate()
}
function explode_IE() {
spancounter=0
if (i_loop<=max_loop-1) {
for (i=0;i<=y_slices-1;i++) {
for (ii=0;ii<=x_slices-1;ii++) {
var thisspan=eval("document.all.span"+spancounter+".style")
x_step[spancounter]=(x_finalpos-thisspan.posLeft)/(max_loop-i_loop)
y_step[spancounter]=(y_finalpos-thisspan.posTop)/(max_loop-i_loop)
thisspan.posLeft+=x_step[spancounter]
thisspan.posTop+=y_step[spancounter]
spancounter++
}
}
i_loop++
var timer=setTimeout("explode_IE()",pause)
}
else {
spancounter=0
clearTimeout(timer)
var timer=setTimeout("changeimage()",2000)
}
}
</SCRIPT>
<SCRIPT>
if (document.all) {
for (i=0;i<=y_slices-1;i++) {
for (ii=0;ii<=x_slices-1;ii++) {
document.write("<span id=‘span"+spancounter+"‘ class=‘spanstyle‘></span>")
spancounter++
}
}
spancounter=0
}
</SCRIPT>
</body>
</html>
原文地址：http://chunzhisu.blog.51cto.com/9123977/1531199
