用JavaScript将数字转换为大写金额

       var digitUppercase = function(n) {
           var fraction = ['角','元'];
           var digit = ['零', '壹', '贰', '叁', '肆',
                       '伍', '陆', '柒', '捌', '玖'];
           var unit =[ 
                        ['元','万','亿'],
                        ['','拾','佰','仟']
                    ];
            var head = n < 0 ? '欠' : '';
            n = Math.abs(n);
            var s = '';
            for (var i = 0; i<fraction.length;i++) {
                s += (digit[Math.floor(n*10*Math.pow(10,i)) % 10] + fraction[i]).replace(/零./,'');

            }
            s = s || '整';
            n = Math.floor(n);
            for(var i= 0;i<unit[0].length && n>0;i++) {
                var p = '';
                for(var j = 0;j< unit[1].length && n> 0;j++) {
                     p = digit[n % 10] + unit[1][j] + p;
                     n = Math.floor(n / 10);
                }
                s = p.replace(/(零.)*零$/,'').replace(/^$/,'零')+ unit[0][i] + s 
       }
       return head + s.replace(/(零.)*零元/,'元')
                    .replace(/(零.)+/g, '零')
                    .replace(/^整$/, '零元整');
  }
  console.info(digitUppercase(75864.25));
  console.info(digitUppercase(30000));
  console.info(digitUppercase(75864.25));
  console.info(digitUppercase(951434677682.00));