Split string into array

/* ----------------------------------------------------------------
Split: Returns a zero-based, one-dimensional array containing
a specified number of substrings

Parameters:
Expression = String expression containing substrings and
delimiters. If expression is a zero-length
string(""), Split returns an empty array,
that is, an array with no elements and no
data.
Delimiter = String character used to identify substring
limits. If delimiter is a zero-length
string (""), a single-element array
containing the entire expression string
is returned.

Returns: String
---------------------------------------------------------------- */
function Split(Expression, Delimiter)
{
var temp = Expression;
var a, b = 0;
var array = new Array();

if (Delimiter.length == 0)
{
array[0] = Expression;
return (array);
}

if (Expression.length == '')
{
array[0] = Expression;
return (array);
}

Delimiter = Delimiter.charAt(0);

for (var i = 0; i < Expression.length; i++)
{
a = temp.indexOf(Delimiter);
if (a == -1)
{
array[i] = temp;
break;
}
else
{
b = (b + a) + 1;
var temp2 = temp.substring(0, a);
array[i] = temp2;
temp = Expression.substr(b, Expression.length - temp2.length);
}
}

return (array);
}