1 //浮点数加法运算
2 function FloatAdd(arg1,arg2){
3 var r1,r2,m;
4 try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
5 try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
6 m=Math.pow(10,Math.max(r1,r2));
7 return (arg1*m+arg2*m)/m;
8 }
9
10 //浮点数减法运算
11 function FloatSub(arg1,arg2){
12 var r1,r2,m,n;
13 try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
14 try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
15 m=Math.pow(10,Math.max(r1,r2));
16 //动态控制精度长度
17 n=(r1=r2)?r1:r2;
18 return ((arg1*m-arg2*m)/m).toFixed(n);
19 }
20
21 //浮点数乘法运算
22 function FloatMul(arg1,arg2)
23 {
24 var m=0,s1=arg1.toString(),s2=arg2.toString();
25 try{m+=s1.split(".")[1].length}catch(e){}
26 try{m+=s2.split(".")[1].length}catch(e){}
27 return Number(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);
28 }
29
30
31 //浮点数除法运算
32 function FloatDiv(arg1,arg2){
33 var t1=0,t2=0,r1,r2;
34 try{t1=arg1.toString().split(".")[1].length}catch(e){}
35 try{t2=arg2.toString().split(".")[1].length}catch(e){}
36 with(Math){
37 r1=Number(arg1.toString().replace(".",""));
38 r2=Number(arg2.toString().replace(".",""));
39 return (r1/r2)*pow(10,t2-t1);
40 }
41 }
42
