Javascript: Prime or not

This script is a slightly modified version of "Unique Random Numbers". In this script it becomes easier to implement more than one instances of "Picking Unique Random Numbers".

This JavaScript picks up a number of unique random elements from an array.
For example; if you have an array myArray consisting of 10 elements and want to pick 5 unique random elements. Suppose initially myArray[3] is picked randomly, then myArray[3] should not be picked again.

<html>

<head>

<title>Unique Random Numbers II</title>

<!--BEGIN HEAD SECTION CODE-->

<script language="JavaScript">

// Unique Random Numbers II

// -Picks a number of unique random numbers from an array

// By Premshree Pillai

// http://www.qiksearch.com, http://javascript.qik.cjb.net


function pickNums(nums, numArr, pickArr, count, doFlag, iterations)

{

 iterations+=1;

 var currNum = Math.round((numArr.length-1)*Math.random());

 if(count!=0)

 {

  for(var i=0; i<pickArr.length; i++)

  {

   if(numArr[currNum]==pickArr[i])

   {

    doFlag=true;

    break;

   }

  }

 }

 if(!doFlag)

 {

  pickArr[count]=numArr[currNum];

  document.write('<b>' + numArr[currNum] + '</b> <font color="#808080">|</font> ');

  /* Modify above line for a different format output */

  count+=1;

 }

 if(iterations<(numArr.length*3)) // Compare for max iterations you want

 {

  if((count<nums))

  {

   pickNums(nums, numArr, pickArr, count, doFlag, iterations);

  }

 }

 else

 {

  location.reload();

 }

}

</script>

</head>

<!--END HEAD SECTION CODE-->

<body bgcolor="#FFFFFF">


<!--BEGIN BODY SECTION CODE-->

<script language="JavaScript">

var numArr1 = new Array("0","1","2","3","4","5","6","7","8","9"); // Add elements here

var pickArr1 = new Array(); // The array that will be formed

var count1=0;

var doFlag1=false;

var iterations1=0;


pickNums(5, numArr1, pickArr1, count1, doFlag1, iterations1); // Call the function, the argument is the number of elements you want to pick.

             // Here we pick 5 unique random numbers

</script>

<!--END BODY SECTION CODE-->


</body>

</html>