js 将页面小写金额转换成大写金额

	function changeChineseNumber(num)
	{
    if (isNaN(num) || num > Math.pow(10, 12)) return ""
    var cn = "零壹贰叁肆伍陆柒捌玖"
    var unit = new Array("拾百千", "分角")
    var unit1= new Array("万亿", "")
    var numArray = num.toString().split(".")
    var start = new Array(numArray[0].length-1, 2)
    function toChinese(num, index)
    {
        var num = num.replace(/\d/g, function ($1)
        {
            return cn.charAt($1)+unit[index].charAt(start--%4 ? start%4 : -1)
        })
        return num
    }
    for (var i=0; i<numArray.length; i++)
    {
        var tmp = ""
        for (var j=0; j*4<numArray[i].length; j++)
        {
        var strIndex = numArray[i].length-(j+1)*4
        var str = numArray[i].substring(strIndex, strIndex+4)
        var start = i ? 2 : str.length-1
        var tmp1 = toChinese(str, i)
        tmp1 = tmp1.replace(/(零.)+/g, "零").replace(/零+$/, "")
        tmp1 = tmp1.replace(/^壹拾/, "拾")
        tmp = (tmp1+unit1[i].charAt(j-1)) + tmp
        }
        numArray[i] = tmp
    }
    numArray[1] = numArray[1] ? numArray[1] : ""
    numArray[0] = numArray[0] ? numArray[0]+"元" : numArray[0], numArray[1] = numArray[1].replace(/^零+/, "")
    numArray[1] = numArray[1].match(/分/) ? numArray[1] : numArray[1]+"整"
    return numArray[0]+numArray[1]
	}