/**

• 解決兩個數(shù)相加精度丟失問題
• @param a
• @param b
• @returns {Number}
  /
  function floatAdd(a, b) {
  var c, d, e;
  if(undefined==a||null==a||""==a||isNaN(a)){a=0;}
  if(undefined==b||null==b||""==b||isNaN(b)){b=0;}
  try {
  c = a.toString().split(".")[1].length;
  } catch (f) {
  c = 0;
  }
  try {
  d = b.toString().split(".")[1].length;
  } catch (f) {
  d = 0;
  }
  e = Math.pow(10, Math.max(c, d));
  return (floatMul(a, e) + floatMul(b, e)) / e;
  }
  /*
• 解決兩個數(shù)相減精度丟失問題
• @param a
• @param b
• @returns {Number}
  /
  function floatSub(a, b) {
  var c, d, e;
  if(undefined==a||null==a||""==a||isNaN(a)){a=0;}
  if(undefined==b||null==b||""==b||isNaN(b)){b=0;}
  try {
  c = a.toString().split(".")[1].length;
  } catch (f) {
  c = 0;
  }
  try {
  d = b.toString().split(".")[1].length;
  } catch (f) {
  d = 0;
  }
  e = Math.pow(10, Math.max(c, d));
  return (floatMul(a, e) - floatMul(b, e)) / e;
  }
  /*
• 解決兩個數(shù)相乘精度丟失問題
• @param a
• @param b
• @returns {Number}
  /
  function floatMul(a, b) {
  var c = 0,
  d = a.toString(),
  e = b.toString();
  try {
  c += d.split(".")[1].length;
  } catch (f) {}
  try {
  c += e.split(".")[1].length;
  } catch (f) {}
  return Number(d.replace(".", "")) * Number(e.replace(".", "")) / Math.pow(10, c);
  }
  /*
• 解決兩個數(shù)相除精度丟失問題
• @param a
• @param b
• @returns
  */
  function floatDiv(a, b) {
  var c, d, e = 0,
  f = 0;
  try {
  e = a.toString().split(".")[1].length;
  } catch (g) {}
  try {
  f = b.toString().split(".")[1].length;
  } catch (g) {}
  return c = Number(a.toString().replace(".", "")), d = Number(b.toString().replace(".", "")), floatMul(c / d, Math.pow(10, f - e));
  }