安裝

步驟一  拷貝以下腳本後貼在有關網頁的<head></head>之間。

    
<script type="text/javascript"> function toSpans(span) { var str=span.firstChild.data; var a=str.length; span.removeChild(span.firstChild); for(var i=0; i<a; i++) { var theSpan=document.createElement("SPAN"); theSpan.appendChild(document.createTextNode(str.charAt(i))); span.appendChild(theSpan); } } function CaihongSpan(span, hue, deg, brt, spd, hspd) { this.deg=(deg==null?360:Math.abs(deg)); this.hue=(hue==null?0:Math.abs(hue)%360); this.hspd=(hspd==null?3:Math.abs(hspd)%360); this.length=span.firstChild.data.length; this.span=span; this.speed=(spd==null?50:Math.abs(spd)); this.hInc=this.deg/this.length; this.brt=(brt==null?255:Math.abs(brt)%256); this.timer=null; toSpans(span); this.moveCaihong(); } CaihongSpan.prototype.moveCaihong = function() { if(this.hue>359) this.hue-=360; var color; var b=this.brt; var a=this.length; var h=this.hue; for(var i=0; i<a; i++) { if(h>359) h-=360; if(h<60) { color=Math.floor(((h)/60)*b); red=b;grn=color;blu=0; } else if(h<120) { color=Math.floor(((h-60)/60)*b); red=b-color;grn=b;blu=0; } else if(h<180) { color=Math.floor(((h-120)/60)*b); red=0;grn=b;blu=color; } else if(h<240) { color=Math.floor(((h-180)/60)*b); red=0;grn=b-color;blu=b; } else if(h<300) { color=Math.floor(((h-240)/60)*b); red=color;grn=0;blu=b; } else { color=Math.floor(((h-300)/60)*b); red=b;grn=0;blu=b-color; } h+=this.hInc; this.span.childNodes[i].style.color="rgb("+red+", "+grn+", "+blu+")"; } this.hue+=this.hspd; } </script>

步驟二  拷貝以下腳本貼在網頁<body>之下。

    
<div align="center"> <h3 id="ch1">紅橙黃綠青藍紫，誰持彩練當空舞？</h3> </div> <script type="text/javascript"> var r1=document.getElementById("ch1"); var myCaihongSpan=new CaihongSpan(r1, 0, 360, 255, 50, 18); myCaihongSpan.timer=window.setInterval("myCaihongSpan.moveCaihong()", myCaihongSpan.speed); </script> <div align="center"> <p id="ch2">裝點此關山，今朝更好看！</p> </div> <script type="text/javascript"> var r2=document.getElementById("ch2"); var myCaihongSpan2=new CaihongSpan(r2, 0, 360, 255, 50, 348); myCaihongSpan2.timer=window.setInterval("myCaihongSpan2.moveCaihong()", myCaihongSpan2.speed); </script>