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下雨

作者:佚名来源:不详发布时间:2008-5-23 9:03:47

必须将 JS 代码放在 body 区

<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>下雨</title></head><body><SCRIPT language=JAVASCRIPT> SiteName        = "javascript"; SiteTarget  = "_top"; </SCRIPT><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;}elseif (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=\"red\">");document.write(",</font></layer>");}else {document.write("<layer name=\"dot"+ i +"\" left=\"1\" ");document.write("top=\"1\" visibility=\"show\"><font color=\"red\">");document.write(",</font></layer>");   }}elseif (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=\"red\">");document.write(",</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=\"red\">");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();}elseif (ie4up) {raindropIE();}</SCRIPT></body></html>

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