function CalcCombinations()
{
var Perm,Big,Part,x,y,i
Big=combine.pop.value
if (Big=="")
{alert('Please enter a number');
document.pop.focus();
return;}

Part=document.combine.group.value
if (Part=="")
{alert('Please enter a number');
document.combine.group.focus();
return;}

x=1;y=1

Perm=Big-Part+1
for (i=Perm; i<=Big; i=i+1)
{x=x*i}

for (i=1; i<=Part; i=i+1)
{y=y*i}

permutations.innerHTML="Number of Permutations : "+Comma(x);
combinations.innerHTML="Number of Combinations : "+Comma(Math.round(x/y));
}

function Comma(number) {
number = '' + number;
if (number.length > 3) {
var mod = number.length % 3;
var output = (mod > 0 ? (number.substring(0,mod)) : '');
for (i=0 ; i < Math.floor(number.length / 3); i++) {
if ((mod == 0) && (i == 0))
output += number.substring(mod+ 3 * i, mod + 3 * i + 3);
else
output+= ',' + number.substring(mod + 3 * i, mod + 3 * i + 3);
}
return (output);
}
else return number;
}

function select_area()
{combine.pop.select()}

function select_area1()
{combine.group.select()}

function addbookmark()
{
if (document.all)
{window.external.AddFavorite(document.location,document.title)}
}

var clockID=0
function UpdateClock()
{
if (clockID)
{clearTimeout(clockID);
clockID = 0;}

var H,M,S,Mth,Day,AMPM,Yr
var tDate = new Date();
Day=tDate.getDate()
if (Day<10)
{Day="0"+Day;}

Mth=tDate.getMonth()+1
if (Mth==1){Mth="Jan"}
if (Mth==2){Mth="Feb"}
if (Mth==3){Mth="Mar"}
if (Mth==4){Mth="Apr"}
if (Mth==5){Mth="May"}
if (Mth==6){Mth="Jun"}
if (Mth==7){Mth="Jul"}
if (Mth==8){Mth="Aug"}
if (Mth==9){Mth="Sep"}
if (Mth==10){Mth="Oct"}
if (Mth==11){Mth="Nov"}
if (Mth==12){Mth="Dec"}

Yr=tDate.getFullYear()

H=tDate.getHours();
if (H>11)
{AMPM="pm";}
else
{AMPM="am";}

if (H>12)
{H=H-12;}

if (H<10)
{H="0"+H;}

M=tDate.getMinutes()
if (M<10)
{M="0"+M;}

S=tDate.getSeconds()
if (S<10)
{S="0"+S;}

theTime.innerHTML = Day + " " + Mth + " " + Yr + "::"
+ H + ":" + M + ":" + S + AMPM;
clockID = setTimeout("UpdateClock()",1000);
}

function StartClock() {
clockID = setTimeout("UpdateClock()",1000);
}

function KillClock() {
if (clockID)
 {clearTimeout(clockID);
 clockID = 0;}
}