魚兒水中游

語法說明：

在 var no = 10; 中修改圖案出現在畫面上的數量
在 var speed = 10; 中修改圖案游動的速度，數值越大越慢，越小越快
請自行修改圖檔連結的路徑
欲增加或減少圖案連結網址數，設定 snow[#] = "圖檔連結路徑"; 即可，其中 # 代表為數字

<script language="JavaScript"> 

var no = 10; 

var speed = 10; 
snow = new Array(); 

snow[0] = "圖檔連結路徑";
snow[1] = "圖檔連結路徑";
snow[2] = "圖檔連結路徑";
snow[3] = "圖檔連結路徑";
snow[4] = "圖檔連結路徑";
snow[5] = "圖檔連結路徑";
var maxsize = 100;  
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(); 
var j = 0; 
for (i = 0; i < no; ++ i) { 
	dx[i] = 0;
	xp[i] = Math.random()*(doc_height-maxsize);  
	yp[i] = Math.random()*(doc_width-maxsize); 
	am[i] = Math.random()*10;         
	stx[i] = 0.02 + Math.random()/10; 
	sty[i] = 0.7 + Math.random();     
	if (ns4up) {
		if (i == 0) { 
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + snow[j] + "\" border=\"0\"></layer>"); 
		} else { 
			document.write("<layer name=\"dot"+ i +"\" left=\"15\" top=\"15\" visibility=\"show\"><img src=\"" + snow[j] + "\" 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; width:1;\"><img src=\"" + snow[j] + "\" border=\"0\"></div>"); 
		} else { 
			document.write("<div id=\"dot"+ i +"\" style=\"POSITION: absolute; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: 15px; width:1;\"><img src=\"" + snow[j] + "\" border=\"0\"></div>"); 
		} 	} 
	if (j == (snow.length-1)) { j = 0; } else { j += 1; } 
}  
document.write("<div id=\"damy\" style=\"POSITION: absolute; width:1; Z-INDEX: "+ i +"; VISIBILITY: visible; TOP: 15px; LEFT: " + (doc_width+maxsize) + "px;\"> </div>"); 
function snowNS() {  // Netscape main animation function 
	for (i = 0; i < no; ++ i) {  // iterate for every dot 
		if (i%2) { 
			yp[i] += sty[i]; 
			if (yp[i] > doc_width) { 
				xp[i] = Math.random()*(doc_height-am[i]-maxsize); 
				yp[i] = 0-maxsize; 
				stx[i] = 0.02 + Math.random()/10; 
				sty[i] = 0.7 + Math.random(); 
				doc_width = self.innerWidth; 
				doc_height = self.innerHeight; 
			} 
		} else { 
			yp[i] -= sty[i]; 
			if (yp[i] < -maxsize) { 
				xp[i] = Math.random()*(doc_height-am[i]-maxsize); 
				yp[i] = doc_width; 
				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 = xp[i] + am[i]*Math.sin(dx[i]); 
		document.layers["dot"+i].left = yp[i]; 
	} 
	setTimeout("snowNS()", speed); 
}  
function snowIE() {  // IE main animation function 
	for (i = 0; i < no; ++ i) {  // iterate for every dot 
		if (i%2) { 
			yp[i] += sty[i]; 
			if (yp[i] > doc_width) { 
				xp[i] = Math.random()*(doc_height-am[i]-maxsize); 
				yp[i] = 0-maxsize; 
				stx[i] = 0.02 + Math.random()/10; 
				sty[i] = 0.7 + Math.random(); 
				doc_width = document.body.clientWidth; 
				doc_height = document.body.clientHeight; 
			} 
		} else { 
			yp[i] -= sty[i]; 
			if (yp[i] < -maxsize) { 
				xp[i] = Math.random()*(doc_height-am[i]-maxsize); 
				yp[i] = doc_width; 
				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 = xp[i] + am[i]*Math.sin(dx[i]); 
		document.all["dot"+i].style.pixelLeft = yp[i]; 
	} 
	setTimeout("snowIE()", speed); 
}  
if (ns4up) { 
	snowNS(); 
} else if (ie4up) { 
	snowIE(); 
}  
//--> 
 </script>