将下列代码加到你的网页里, 通过num2chi()函数的调用就可以实现上述功能了, 快来试一试吧. 为了各位能读懂这段代码, 在下特意加入详细注解, 还请老鸟们不要嫌罗唆, ^_^.

//----------------------FUNCTION BEGIN-----------------------------
//-------------------------------------------
//函数名: num2chi()
//叁  数: 一数字
//返回值: 一字符串
//功  能: 将难读的长串数字转为顺口读出的汉字
//作  者: chen.anson  
//站  点: HTTP://dreamer.oso.com.cn
//-------------------------------------------

function num2chi(result) {

var chiresult = "";            //定义返回值叁数chiresult为字符形式
result = result.toString();    //将result转为字符形式
result = result.toLowerCase();
resultlen = result.length;    //定义resultlen为result的长度
tempresult = result;        //定义中间变量tempresult

for (i=1;i<=resultlen;i++)    //将字符串tempresult中的全部数字替换为汉字
{
    tempresult = tempresult.replace("1","一");
    tempresult = tempresult.replace("2","二");
    tempresult = tempresult.replace("3","三");
    tempresult = tempresult.replace("4","四");
    tempresult = tempresult.replace("5","五");
    tempresult = tempresult.replace("6","六");
    tempresult = tempresult.replace("7","七");
    tempresult = tempresult.replace("8","八");
    tempresult = tempresult.replace("9","九");
    tempresult = tempresult.replace("0","零");
    tempresult = tempresult.replace(".","点");
    tempresult = tempresult.replace("e+","幂");
}

while(tempresult.indexOf("零零")!=-1)    //避免字符串tempresult中出现"零零", 但又不能改变字符串长度
{
    tempresult = tempresult.replace("零零","位零");
}

resultlen = tempresult.length;    //再次确认tempresult的长度, 因"e+"->"幂"会引起长度变化

for (i=1,j=1,k=1;i<=resultlen;i++)    //开始转换, i为位数确认叁数, j为"十百千"确认叁数, k为"万亿"确认叁数
{
    //防止尾数为零, 如八拾零, 二拾零万
    if (tempresult.charAt(resultlen-1)=="零"&&i==1)
        chiresult = "位";
    else if (tempresult.charAt(resultlen-i)=="零"&&j==1)
        chiresult = "位" + chiresult;
    //--------------------------------

    //避免把"幂"和"点"当做实际位数, 而且单位确认变量重新计数
    else if (tempresult.charAt(resultlen-i)=="幂")
    {
        j=1;k=1;chiresult = tempresult.charAt(resultlen-i) + chiresult;continue;
    }
    else if (tempresult.charAt(resultlen-i)=="点")
    {
        j=1;k=1;chiresult = tempresult.charAt(resultlen-i) + chiresult;continue;
    }
    //--------------------------------------
    else
    chiresult = tempresult.charAt(resultlen-i) + chiresult;
    //添加数字单位
        if (tempresult.charAt(resultlen-i-1)!="位"&&tempresult.charAt(resultlen-i-1)!="零"&&tempresult.charAt(resultlen-i-1)!="幂")
        {
            if (j==1&&i<resultlen) chiresult = "拾" + chiresult;
            else if (j==2&&i<resultlen) chiresult = "百" + chiresult;
            else if (j==3&&i<resultlen) chiresult = "千" + chiresult;
        }
        if (j==4&&i<resultlen) j=0;
        if (k==4&&i<resultlen&&tempresult.charAt(resultlen-i-1)!="幂") chiresult = "万" + chiresult;
        else if (k==8&&i<resultlen&&tempresult.charAt(resultlen-i-1)!="幂") {k=0;chiresult = "亿" + chiresult;}
    //-----------
    j++;k++;
}

while(chiresult.indexOf("位")!=-1)    //避免字符串chiresult中出现"位"
{
    chiresult = chiresult.replace("位","");
}

if (chiresult.substr(0,2)=="一拾")    //避免出现"一拾二"等情况
chiresult = chiresult.substring(1,chiresult.length);

//幂和小数点後的数字应直接读出, 而没有单位
if (chiresult.search("幂")>=0&&chiresult.search("点")>=0)
{
    rebegin = chiresult.substring(0,chiresult.indexOf("点"));
    relast = chiresult.substring(chiresult.indexOf("幂"),chiresult.length);
    remid = chiresult.substring(chiresult.indexOf("点"),chiresult.indexOf("幂"));
    for (i=1;i<=remid.length;i++)
    {
        remid = remid.replace("拾","");
        remid = remid.replace("百","");
        remid = remid.replace("千","");
        remid = remid.replace("万","");
        remid = remid.replace("亿","");
    }
    chiresult = rebegin + remid + relast;
}
else if (chiresult.search("幂")<0&&chiresult.search("点")>=0)
{
    rebegin = chiresult.substring(0,chiresult.indexOf("点"));
    relast = chiresult.substring(chiresult.indexOf("点"),chiresult.length);
    for (i=1;i<=relast.length;i++)
    {
        relast = relast.replace("拾","");
        relast = relast.replace("百","");
        relast = relast.replace("千","");
        relast = relast.replace("万","");
        relast = relast.replace("亿","");
    }
    chiresult = rebegin + relast;
}

if (chiresult.search("幂")>=0)    //将"幂"替换为"乘以拾的", 这样可以直接读出  
{
    chiresult = chiresult.replace("幂","乘以拾的");
    chiresult = chiresult + "次方";
}
return chiresult;
}

//----------------------FUNCTION END-------------------------------

将下面这两条语句放到script块中试运行一下看看结果对不对, 另外可以访问我的主页http://dreamer.oso.com.cn 在休闲广场里有一个彩票页面, 就是用这段代码实现的, 欢迎光临.
hi='48000567542450084.115846E+766600050';
document.write(hi+"<br>"+num2chi(hi));