要完成此效果需要三个步骤
第一步:把如下代码加入到<head>区域中
<STYLE>.spanstyle {
    COLOR: #0066ff; FONT-FAMILY: 隶书; FONT-SIZE: 14pt; FONT-WEIGHT: normal; POSITION: absolute; TOP: -50px; VISIBILITY: visible
}
</STYLE>
第二步:把如下代码加入到<body>区域中
<SCRIPT language=javascript>
    var message="我 爱 你 一 生 一 世 !";
    var x,y;
    var step=12;
    var flag=0;
    message=message.split("");
    var xpos=new Array();
    for (i=0;i<=message.length-1;i++) {
        xpos[i]=-50;
    }
    var ypos=new Array();
    for (i=0;i<=message.length-1;i++) {
        ypos[i]=-50;
    }
    function handlerMM(e) {
        x = (document.layers) ? e.pageX : document.body.scrollLeft+event.clientX+10;
        y = (document.layers) ? e.pageY : document.body.scrollTop+event.clientY;
        flag=1;
    }
    function makesnake() {
        if (flag==1 && document.all) {
                for (i=message.length-1; i>=1; i--) {
                   xpos[i]=xpos[i-1]+step;
                ypos[i]=ypos[i-1];
                }
            xpos[0]=x+step;
            ypos[0]=y;
            for (i=0; i<=message.length-1; i++) {
                    var thisspan = eval("span"+(i)+".style");
                    thisspan.posLeft=xpos[i];
                thisspan.posTop=ypos[i];
                thisspan.color=Math.random() * 255 * 255 * 255 + Math.random() * 255 * 255 + Math.random() * 255;
                }
        }
        else if (flag==1 && document.layers) {
                for (i=message.length-1; i>=1; i--) {
                   xpos[i]=xpos[i-1]+step;
                ypos[i]=ypos[i-1];
                }
            xpos[0]=x+step;
            ypos[0]=y;
            for (i=0; i<message.length-1; i++) {
                    var thisspan = eval("document.span"+i);
                    thisspan.left=xpos[i];
                thisspan.top=ypos[i];
                thisspan.color=Math.random() * 255 * 255 * 255 + Math.random() * 255 * 255 + Math.random() * 255;
            }
        }
    }
</SCRIPT>
<SCRIPT language=javascript>
    for (i=0;i<=message.length-1;i++) {
            document.write("<span id='span"+i+"' class='spanstyle'>");
        document.write(message[i]);
            document.write("</span>");
    }
    if (document.layers) {
        document.captureEvents(Event.MOUSEMOVE);
    }
    document.onmousemove = handlerMM;
</SCRIPT>
<SCRIPT language=javascript>
    function pageonload() {
        makesnake();
        window.setTimeout("pageonload();", 2);
    }
</SCRIPT>
第三步:把“onload=javascript:pageonload()”加在<body>标记里
例如:<body onload=javascript:pageonload()>