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空中雪花飘飘
  文章来源:网络收集 更新日期:2008-12-05 浏览:
 

<script language="JavaScript">
<!--
var no = 50;var speed = 1;var ns4up = (document.layers) ? 1 : 0;var ie4up = (document.all) ? 1 : 0;
var s, x, y, sn, cs;var a, r, cx, cy;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;}
x = new Array();y = new Array();r = new Array();cx = new Array();cy = new Array();s = 8;for (i = 0; i < no; ++ i) {initRain();
if (ns4up) {if (i == 0) {document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");
document.write("top=\"1\" visibility=\"show\"><font color=\"#6666FF\">");
document.write("*</span></font></layer>");}
else {document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");
document.write("top=\"1\" visibility=\"show\"><font color=\"#6666FF\">");
document.write("*</span></font></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;\"><font color=\"#6666FF\">");
document.write("*</span></font></div>");}
else {document.write("<div id=\"dot"+ i +"\" style=\"POSITION: ");
document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
document.write("visible; TOP: 15px; LEFT: 15px;\"><font color=\"#6666FF\">");
document.write("*</span></font></div>");}}}
function initRain() {a = 6;r[i] = 1;sn = Math.sin(a);cs = Math.cos(a);cx[i] = Math.random() * doc_width + 1;
cy[i] = Math.random() * doc_height + 1;x[i] = r[i] * sn + cx[i];y[i] = cy[i];}
function makeRain() {r[i] = 1;cx[i] = Math.random() * doc_width + 1;cy[i] = 1;x[i] = r[i] * sn + cx[i];y[i] = r[i] * cs + cy[i];}
function updateRain() {r[i] += s;x[i] = r[i] * sn + cx[i];y[i] = r[i] * cs + cy[i];}
function raindropNS() {for (i = 0; i < no; ++ i) {updateRain();
if ((x[i] <= 1) || (x[i] >= (doc_width - 20)) || (y[i] >= (doc_height - 20))) {makeRain();doc_width = self.innerWidth;doc_height = self.innerHeight;}
document.layers["dot"+i].top = y[i];
document.layers["dot"+i].left = x[i];}
setTimeout("raindropNS()", speed);}
function raindropIE() {for (i = 0; i < no; ++ i) {
updateRain();if ((x[i] <= 1) || (x[i] >= (doc_width - 20)) || (y[i] >= (doc_height - 20))) {
makeRain();doc_width = document.body.clientWidth;doc_height = document.body.clientHeight;}
document.all["dot"+i].style.pixelTop = y[i];document.all["dot"+i].style.pixelLeft = x[i];}
setTimeout("raindropIE()", speed);}if (ns4up) {raindropNS();}else;if (ie4up) {raindropIE();}
-->
</script>

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