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注意把图片换成雪花图片,会得到更好的效果!
<!-- http://js.vevb.com/ --><!-- http://bbs.vevb.com/--><!-- 把如下代码加入<body>区域中 --><body><SCR<a href="http://ip.vevb.com/">ip</a>T LANGUAGE="<a href="http://www.vevb.com/article.asp?typeid=160">java</a>Script1.2"><!-- Beginvar no = 12; // number of heartsvar speed = 10; // smaller number moves the hearts fastervar heart = "http://www.vevb.com/img/link.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_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 variablesxp[i] = Math.random()*(doc_width-30)+10; // set position variablesyp[i] = Math.random()*doc_height;amy[i] = 12+ Math.random()*20; // set amplitude variablesamx[i] = 10+ Math.random()*40;stx[i] = 0.02 + Math.random()/10; // set step variablessty[i] = 0.7 + Math.random(); // set step variablesflag[i] = (Math.random()>0.5)?1:0;if (ns4up) { // set layersif (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>");}} 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;/"><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 functionfor (i = 0; i < no; ++ i) { // iterate for every dotif (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];elsedx[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];}setTimeout("snowNS()", speed);}function snowIE() { // IE main animation functionfor (i = 0; i < no; ++ i) { // iterate for every dotif (yp[i] > doc_height-50) {xp[i] = 10+ Math.random()*(doc_width-amx[i]-30);yp[i] = 0;stx[i] = 0.02 + Math.random()/10;sty[i] = 0.7 + Math.random();flag[i]=(Math.random()<0.5)?1:0;doc_width = document.body.clientWidth;doc_height = document.body.clientHeight;}if (flag[i])dx[i] += stx[i];elsedx[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.all["dot"+i].style.pixelTop = yp[i] + amy[i]*(Math.abs(Math.sin(dx[i])+dx[i]));document.all["dot"+i].style.pixelLeft = xp[i] + amx[i]*dx[i];}setTimeout("snowIE()", speed);}if (ns4up) {snowNS();} else if (ie4up) {snowIE();}// End --></script>
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