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 楼主|
发表于 2006-2-17 11:21
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| <  >网页特效:下雨</P><  ><SCRIPT language=JavaScript> <!--
 var no = 50;//泡泡的数量
 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) {</P><
  >//以下有些是对泡泡的颜色及泡泡符号的设置,○改为别的,那么往下掉的就不是泡泡了</P><  >document.write("<layer name=\"dot"+ i +"\" left=\"1\" "); document.write("top=\"1\" visibility=\"show\"><font color=\"#99CCFF\">");
 document.write("/</font></layer>");
 }
 else {
 document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");
 document.write("top=\"1\" visibility=\"show\"><font color=\"#99CCFF\">");
 document.write("/</font></layer>");
 }
 }
 else
 if (ie4up) {
 if (i == 0) {
 document.write("<div id=\"dot"+ i +"\" style=\"
  OSITION: "); document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
 document.write("visible; TOP: 15px; LEFT: 15px;\"><font color=\"#99CCFF\">");
 document.write("/</font></div>");
 }
 else {
 document.write("<div id=\"dot"+ i +"\" style=\"
  OSITION: "); document.write("absolute; Z-INDEX: "+ i +"; VISIBILITY: ");
 document.write("visible; TOP: 12px; LEFT: 12px;\"><font color=\"#99CCFF\">");
 document.write("/</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();
 }</P><
  >--> </SCRIPT></P>
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