JavaScript:雪景

时间:2010-04-01 18:04:14  来源:第二电脑网  作者:第二电脑网

  第二电脑网导读:./image/xue.GIF";var flag;var ns4up = (document.layers) ? 1 : 0;  // browser sniffervar ie4up = (document.all) ? 1 : 0;var dx, xp, yp;    // coordinate and position variablesvar am, stx, sty;  // amplitude and step variablesvar i, doc_width = 800, doc_height = 600;if (ns4up) {doc_...
  正文:

将下列代码加入<body>区语种:
<SCRIPT LANGUAGE="JavaScript1.2">
<!-- Begin
var no = 12; // number of hearts
var speed = 10; // smaller number moves the hearts faster
var heart = "../../image/xue.GIF";
var flag;
var ns4up = (document.layers) ? 1 : 0;  // browser sniffer
var ie4up = (document.all) ? 1 : 0;

var dx, xp, yp;    // coordinate and position variables
var am, stx, sty;  // amplitude and step variables
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();
amx = new Array();
amy = new Array();
stx = new Array();
sty = new Array();
flag = new Array();
for (i = 0; i < no; ++ i) {
dx[i] = 0;                        // set coordinate variables
xp[i] = Math.random()*(doc_width-30)+10;  // set position variables
yp[i] = Math.random()*doc_height;
amy[i] = 12+ Math.random()*20;         // set amplitude variables
amx[i] = 10+ Math.random()*40;
stx[i] = 0.02 + Math.random()/10; // set step variables
sty[i] = 0.7 + Math.random();     // set step variables
flag[i] = (Math.random()>0.5)?1:0;
if (ns4up) {                      // set layers
if (i == 0) {
document.write("<layer name="dot"+ i +"" left="15" ");
document.write("top="15" visibility="show"><img src="");
document.write(heart+ "" border="0"></layer>");
} else {
document.write("<layer name="dot"+ i +"" left="15" ");
document.write("top="15" visibility="show"><img src="");
document.write(heart+ "" border="0"></layer>");
}
} else
if (ie4up) {
if (i == 0) {
document.write("<div id="dot"+ i +"" style="POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;"><img src="");
document.write(heart+ "" border="0"></div>");
} else {
document.write("<div id="dot"+ i +"" style="POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;"><img src="");
document.write(heart+ "" border="0"></div>");
}
}
}

function snowNS() {  // Netscape main animation function
for (i = 0; i < no; ++ i) {  // iterate for every dot
if (yp[i] > doc_height-50) {
xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);
yp[i] = 0;
flag[i]=(Math.random()<0.5)?1:0;
stx[i] = 0.02 + Math.random()/10;
sty[i] = 0.7 + Math.random();
doc_width = self.innerWidth;
doc_height = self.innerHeight;
}
if (flag[i])
dx[i] += stx[i];
else
dx[i] -= stx[i];
if (Math.abs(dx[i]) > Math.PI) {
yp[i]+=Math.abs(amy[i]*dx[i]);
xp[i]+=amx[i]*dx[i];
dx[i]=0;
flag[i]=!flag[i];
}
document.layers["dot"+i].top = yp[i] +
amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));
document.layers["dot"+i].left = xp[i] + amx[i]*dx[i];

JavaScript:雪景》由第二电脑网原创提供,转载请注明:http://www.002pc.com/master/College/Programming/JavaScript/13440.html


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