//浮點數(shù)加法運算

functionFloatAdd(arg1,arg2){

????var r1,r2,m;

????try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}

????try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}

????m=Math.pow(10,Math.max(r1,r2));

????return(arg1*m+arg2*m)/m;

}

//浮點數(shù)減法運算

functionFloatSub(arg1,arg2){

????var r1,r2,m,n;

????try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}

????try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}

????m=Math.pow(10,Math.max(r1,r2));

????//動態(tài)控制精度長度

????n=(r1=r2)?r1:r2;

????return((arg1*m-arg2*m)/m).toFixed(n);

}

//浮點數(shù)乘法運算

functionFloatMul(arg1,arg2)

{

????var m=0,s1=arg1.toString(),s2=arg2.toString();

????try{m+=s1.split(".")[1].length}catch(e){}

????try{m+=s2.split(".")[1].length}catch(e){}

????returnNumber(s1.replace(".",""))*Number(s2.replace(".",""))/Math.pow(10,m);

}

functionFloatDiv(arg1,arg2){

????var t1=0,t2=0,r1,r2;

????try{t1=arg1.toString().split(".")[1].length}catch(e){}

????try{t2=arg2.toString().split(".")[1].length}catch(e){}

????with(Math){

????????r1=Number(arg1.toString().replace(".",""));

????????r2=Number(arg2.toString().replace(".",""));

????????return(r1/r2)*pow(10,t2-t1);

????}

}