JavaScript实现漫天飞花及文字滚动特效的代码

代码简介：

漫天飞花及文字滚动特效，不知道该怎么形容这种效果，它是图片和文字相结合的一种特效，就叫做漫天飞花吧，另外它还可以控制一组文字上下滚动，也就走马灯，个性十足。

代码内容：

<title>JavaScript实现漫天飞花及文字滚动特效的代码 - www.webdm.cn</title>
<SCRIPT language=JavaScript>
 //设置marquee的宽度(in pixels)  
var marqueewidth=190 
//设置marquee的高度  
var marqueeheight=200 
//设置marquee的速度  
var speed=1
//设置marquee的显示内容  
var marqueecontents=  
 
ef="<center><p>网页代码站(Webdm.cn)</center>" 
 
if (document.all)  
document.write('<marquee direction="up" scrollAmount='+speed+' style="'+marqueewidth+';height:'+marqueeheight

+'">'+marqueecontents+'</marquee>')  
 
 function regenerate(){  
window.location.reload()  
}  
function regenerate2(){  
if (document.layers){  
setTimeout("window.onresize=regenerate",450)  
intializemarquee()  
}  
}  
 
function intializemarquee(){  
document.cmarquee01.document.cmarquee02.document.write(marqueecontents)  
document.cmarquee01.document.cmarquee02.document.close()  
thelength=document.cmarquee01.document.cmarquee02.document.height  
scrollit()  
}  
 
function scrollit(){  
if (document.cmarquee01.document.cmarquee02.top>=thelength*(-1)){  
document.cmarquee01.document.cmarquee02.top-=speed  
setTimeout("scrollit()",100)  
}  
else{  
document.cmarquee01.document.cmarquee02.top=marqueeheight  
scrollit()  
}  
}  
 
window.onload=regenerate2  
</SCRIPT>

<script language="JavaScript1.2"><!-- Begin
var no = 20;
var speed = 10; 
var snowflake = "http://www.webdm.cn/themes/pic/webdm_logo.gif";

var ns4up = (document.layers) ? 1 : 0;  
var ie4up = (document.all) ? 1 : 0;
var dx, xp, yp;  
var am, stx, sty; 
var i, doc_width = 800, doc_height = 600;
if (ns4up) {
doc_width = self.innerWidth;
doc_height = self.innerHeight;
} else if (ie4up) {
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx = new Array();
xp = new Array();
yp = new Array();
am = new Array();
stx = new Array();
sty = new Array();
for (i = 0; i < no; ++ i) {  
dx[i] = 0;   
xp[i] = Math.random()*(doc_width-50);  
yp[i] = Math.random()*doc_height;
am[i] = Math.random()*20; 
stx[i] = 0.02 + Math.random()/10; 
sty[i] = 0.7 + Math.random(); 
if (ns4up) {  
if (i == 0) {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + snowflake + "\" 

border=\"0\"></layer>");
} else {
document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + snowflake + "\" 

border=\"0\"></layer>");
   }
} else if (ie4up) {
if (i == 0) {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; 

LEFT: 15px;\"><img src=\"" + snowflake + "\" border=\"0\"></div>");
} else {
document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; 

LEFT: 15px;\"><img src=\"" + snowflake + "\" border=\"0\"></div>");
      }
   }
}
function snowNS() {  
for (i = 0; i < no; ++ i) { 
yp[i] += sty[i];
if (yp[i] > doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
dx[i] += stx[i];
document.layers["dot"+i].top = yp[i];
document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowNS()", speed);
}

function snowIE() { 
for (i = 0; i < no; ++ i) {  
yp[i] += sty[i];
if (yp[i] > doc_height-50) {
xp[i] = Math.random()*(doc_width-am[i]-30);
yp[i] = 0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = document.body.clientWidth;
doc_height = document.body.clientHeight;
}
dx[i] += stx[i];
document.all["dot"+i].style.pixelTop = yp[i];
document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
}
setTimeout("snowIE()", speed);
}
if (ns4up) {
snowNS();
} else if (ie4up) {
snowIE();
}
// End -->
</script>
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</p>

代码来自：http://www.webdm.cn/webcode/3580774a-078a-470e-8fbd-a25aaec5e24f.html