js中的阿拉伯数字转中文大写

function change(num){ 

var strOutput = "",
strUnit ="仟佰拾亿仟佰拾万仟佰拾元角分";
num += "00";

var intPos = num.indexOf('.');
if (intPos >= 0){
num = num.substring(0, intPos) + num.substr(intPos + 1, 2);
}
strUnit = strUnit.substr(strUnit.length - num.length);
for (var i=0; i < num.length; i++){
strOutput += '零壹贰叁肆伍陆柒捌玖'.substr(num.substr(i,1),1) + strUnit.substr(i,1);
}
return strOutput.replace("/零角零分$/", "整").replace("/零[仟佰拾]/g", "零").replace("/零{2,}/g", "零").replace("/零([亿|万])/g", "$1").replace("/零+元/", "元").replace("/亿零{0,3}万/", "亿").replace("/^元/", "零元");
}