Test a number is a 5 digit palindrome using arrays

[hl2ob]

Alright I'm still new to javascript. I was getting it pretty well, and getting everything alright untill this point.

We have to make a program that test a 5 digit number as a palindrome. I have no clue on how to do this. I was given advice that I'd need to use arrays, but for javascript I have no idea how to work with them. I read some stuff in a book and read some tutorials, but this is the best I can do:

var numa
var pal = new Array(5)
 
numa = window.prompt( "Please enter a five digit number number");
num1 = parseInt ( numa );
 
  while (numa < 10000 || numa > 99999 )
  {
   window.alert ("The number is not 5 digits please enter a 5 digit number ");
   numa = window.prompt( "Please enter a five digit number number");
   }
 
   for (var i = 0; i < 5; ++i)
    {pal[ num1 ] = numa;
    }
 
    pal.test (compareIntegers );
 
    function compareIntegers(vaule1, vaule2, vaule4, vaule5)
    {
    if (vaule1 == vaule5 );
      {
      if (vaule2 == vaule4 )
        {
        doucment.writeln ( "The number is a palindrome")
        }
       }
     else   
        document.writeln ("The number is not a palindrome")
        }
 

I know I'm probably way off, as the page is just complety blank, but sadly I really have no clue what to do. The first part (Testing to make sure it's a 5 didgit number) I have down. Other than that, I could use any advice that could be given .
Thank you for your time and help.

[mrhoo]

You don't need an array.
You can use a regular expression.

var n= true,s=s1= 'Enter a 5 digit number';
while(n!= undefined){
    n= prompt(s,'')
    var testpal= /^(\d)(\d)\d\2\1$/.test(n)? '' : ' not ';
    s= n+' is '+testpal+'a 5 digit palindome\n'+s1;
}

[hl2ob]

You don't need an array.
You can use a regular expression.

var n= true,s=s1= 'Enter a 5 digit number';
while(n!= undefined){
    n= prompt(s,'')
    var testpal= /^(\d)(\d)\d\2\1$/.test(n)? '' : ' not ';
    s= n+' is '+testpal+'a 5 digit palindome\n'+s1;
}

Ok that's helpful, but part of the code has to test to make sure it's a 5 digit number. In order to do that would I have to add in n > 99999 II n < 10000 in there somewhere?

Thanks again.

[mrhoo]

Try the code with anything other than a 5 digit number in the prompt