JSP page Subtraction

Multiplication
function Nummulti (NUM1, num2) {
var basenum = 0;
try {
Basenum + = Num1.tostring (). Split (".") [1].length;
} catch (e) {
}
try{
Basenum + = Num2.tostring (). Split (".") [1].length;
} catch (e) {
}
Return number (num1.tostring (). Replace (".", "")) * Number (num2.tostring (). Replace (".", "") "/Math.pow (Basenum);
}
Addition
function Numadd (NUM1, num2) {
var basenum, BaseNum1, baseNum2;
try {
BASENUM1 = Num1.tostring (). Split (".") [1].length;
} catch (e) {
BASENUM1 = 0;
}
try {
baseNum2 = Num2.tostring (). Split (".") [1].length;
} catch (e) {
baseNum2 = 0;
}
Basenum = Math.pow (Ten, Math.max (basenum1,basenum2));
Return (Nummulti (num1,basenum) +nummulti (num2,basenum))/basenum;
}
Subtraction
function Numsubtr (num1,num2) {
var basenum, BaseNum1, baseNum2;
try{
Basenum1=num1.tostring (). Split (".") [1].length;
}catch (e) {
basenum1=0;
}
try{
Basenum2=num2.tostring (). Split (".") [1].length;
}catch (e) {
basenum2=0;
}
Basenum=math.pow (10,math.max (basenum1,basenum2));
Return (Nummulti (num1,basenum)-nummulti (num2,basenum))/basenum;
}
Division
function Numdiv (num1,num2) {
var basenum, BaseNum1, baseNum2;
try{
Basenum1=num1.tostring (). Split (".") [1].length;
}catch (e) {
basenum1=0;
}
try{
Basenum2=num2.tostring (). Split (".") [1].length;
}catch (e) {
basenum2=0;
}
With (Math) {
Basenum=math.pow (10,BASENUM2-BASENUM1);
Return (number (num1.tostring (). Replace (".", ""))/number (Num2.tostring (). Replace (".", ""))) *basenum;
}
}
Calculates the two date difference between days
function DateDiff (sDate1, SDate2) {//sdate1 and sDate2 are in YYYY-MM-DD format
var adate, oDate1, ODate2, idays;
Adate = Sdate1.split ("") [0].split ("-");
oDate1 = new Date (adate[0] + '-' + adate[1] + '-' + adate[2]); Convert to YYYY-MM-DD format
Adate = Sdate2.split ("-");
ODate2 = new Date (adate[0] + '-' + adate[1] + '-' + adate[2]);
Idays = parseint ((odate1-odate2)/1000/60/60/24); Converts the difference in milliseconds to days
return idays; Returns the difference in days
}

JSP page Subtraction