Combinations And Permutations

1. Copy and paste the following between your HEAD tags:-

<script language="javascript">
function CalcCombinations()
{
var Perm,Big,Part,x,y,i
Big=document.combine.pop.value
if (Big=="")
{alert('Please enter a number');
document.combine.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 : "+x;
combinations.innerHTML="Number of Combinations : "+Math.round(x/y);
}
</script>

2. Copy and paste the following code between your BODY tags where you want the input displayed:
<div style="position:absolute; left:?; top:?">
<table width=100% border=1 bordercolor=#000000 cellspacing="0" cellpadding="10" bgcolor="#cccccc"><tr><td style="font-size:10pt">
<form name="combine">
Combine  
<input type="text" size="5" name="pop" style="text-align:center" value="5" onKeyPress="if ((event.keyCode<48) || (event.keyCode>57)) event.returnValue=false" onClick=value=""> 
numbers taking  
<input type="text" size="5" name="group" style="text-align:center" value="3" onKeyPress="if ((event.keyCode<48) || (event.keyCode>57)) event.returnValue=false" onClick=value="">
 at a time
<p>
<input type="button" value="Calculate Combinations & Permutations" style="cursor:hand;color:#ff0000" title="combinations and permutations" onClick="CalcCombinations()">
<a href="www.datedial.com/datCombinations.asp"></a>

You can position the display whereever you like. You change the "left" and "top" values in the "div" tag above to whatever values you need. 
a) "top" is the vertical distance of the top left corner of the display starting at zero. The higher the number the lower down the page.
b) "left" is the horizontal distance of the top left corner of the display starting at zero. The higher the number the further across the page.
c) You can change also the color of the display and the background.

If you have any problems or questions please email us at wsmith112@hotmail.com.

Linking Information:-
TITLE : Combinations And Permutations
URL : http://www.datedial.com/datCombinations.asp
DESCRIPTION : Find the number of combinations and permutations that a set of numbers can be divided into.