JavaScript floating point arithmetic

<script type= "Text/javascript" >//Two floating-point number summation function Accadd (num1,num2) {var r1,r2,m; try{r1 = num1.tostring (). Split ('. ')       [1].length;       }catch (e) {r1 = 0; } try{r2=num2.tostring (). Split (".")       [1].length;       }catch (e) {r2=0;       } m=math.pow (10,math.max (R1,R2));       Return (num1*m+num2*m)/m;    Return Math.Round (num1*m+num2*m)/m;       }//Two floating-point subtraction function accsub (num1,num2) {var r1,r2,m; try{r1 = num1.tostring (). Split ('. ')       [1].length;       }catch (e) {r1 = 0; } try{r2=num2.tostring (). Split (".")       [1].length;       }catch (e) {r2=0;       } m=math.pow (10,math.max (R1,R2));       N= (R1&GT;=R2) r1:r2;    Return (Math.Round (num1*m-num2*m)/m). ToFixed (n);       }//Two number divide function Accdiv (num1,num2) {var t1,t2,r1,r2; try{T1 = num1.tostring (). Split ('. ')       [1].length;  }catch (e) {t1 = 0;     } try{t2=num2.tostring (). Split (".")       [1].length;       }catch (e) {t2=0;       } r1=number (Num1.tostring (). Replace (".", ""));       R2=number (Num2.tostring (). Replace (".", ""));    Return (R1/R2) *math.pow (10,T2-T1);     } function Accmul (num1,num2) {var m=0,s1=num1.tostring (), s2=num2.tostring (); Try{m+=s1.split (".")    [1].length}catch (e) {}; Try{m+=s2.split (".")    [1].length}catch (e) {};    Return number (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10,m);    } </script> <script> document.write ("Using JS Primitive Ecological method");    document.write ("<br/> 1.01 + 1.02 =" + (1.01 + 1.02));    document.write ("<br/> 1.01-1.02 =" + (1.01-1.02));    document.write ("<br/> 0.000001/0.0001 =" + (0.000001/0.0001));    document.write ("<br/> 0.012345 * 0.000001 =" + (0.012345 * 0.000001));    document.write ("<br/>