这是一款飘落雪花的特效.冬天到了,添加到自己的博客中,相信也会增强我们对2006年第一场大雪到来的期待!

代码如下:

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<DIV>&nbsp;&nbsp; </DIV><SCRIPT>
<SCRIPT language=JavaScript1.2>
   var snowsrc="http://s4.sinaimg.cn/orignal/48e939f1329c53c5c00e3"
   var no = 10;
   var ns4up = (document.layers) ? 1 : 0;  
   var ie4up = (document.all) ? 1 : 0;
   var dx, xp, yp;   
   var am, stx, sty;  
   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();
   am = new Array();
   stx = new Array();
   sty = new Array();
   for (i = 0; i < no; ++ i) { 
     dx[i] = 0;                        // set coordinate variables
     xp[i] = Math.random()*(doc_width-50);  // set position variables
     yp[i] = Math.random()*doc_height;
     am[i] = Math.random()*20;         // set amplitude variables
     stx[i] = 0.02 + Math.random()/10; // set step variables
     sty[i] = 0.7 + Math.random();     // set step variables
     if (ns4up) {                      // set layers
       if (i == 0) {
         document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><a href=\"http://blog.sina.com.cn/u/1223244273/\"><img src='"+snowsrc+"' border=\"0\"></a></layer>");
       } else {
         document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src='"+snowsrc+"' border=\"0\"></layer>");
       }
     } else if (ie4up) {
       if (i == 0) {
         document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><a href=\"http://blog.sina.com.cn/u/1223244273\"><img src='"+snowsrc+"' border=\"0\"></a></div>");
       } else {
         document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px;\"><img src='"+snowsrc+"' border=\"0\"></div>");
       }
     }
   }
   function snowNS() {  // Netscape main animation function
     for (i = 0; i < no; ++ i) {  // iterate for every dot
       yp[i] += sty[i];
       if (yp[i] > doc_height-50) {
         xp[i] = Math.random()*(doc_width-am[i]-30);
         yp[i] = 0;
         stx[i] = 0.02 + Math.random()/10;
         sty[i] = 0.7 + Math.random();
         doc_width = self.innerWidth;
         doc_height = self.innerHeight;
       }
       dx[i] += stx[i];
       document.layers["dot"+i].top = yp[i];
       document.layers["dot"+i].left = xp[i] + am[i]*Math.sin(dx[i]);
     }
     setTimeout("snowNS()", 10);
   }
 
   function snowIE() {  // IE main animation function
     for (i = 0; i < no; ++ i) {  // iterate for every dot
       yp[i] += sty[i];
       if (yp[i] > doc_height-50) {
         xp[i] = Math.random()*(doc_width-am[i]-30);
         yp[i] = 0;
         stx[i] = 0.02 + Math.random()/10;
         sty[i] = 0.7 + Math.random();
         doc_width = document.body.clientWidth;
         doc_height = document.body.clientHeight;
       }
       dx[i] += stx[i];
       document.all["dot"+i].style.pixelTop = yp[i];
       document.all["dot"+i].style.pixelLeft = xp[i] + am[i]*Math.sin(dx[i]);
     }
     setTimeout("snowIE()", 10);
   }
 
   if (ns4up) {
     snowNS();
   } else if (ie4up) {
     snowIE();
   }
  </SCRIPT>

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