Strings to Arrays and Back II

// String to Array
function stringArray(aString)
{
    var i = 0
    var idx = 0
    var s = ""+aString
    
    if (s == "")
    {
        this.length = 0
        return this
    }
    
    // search for the colon to create each array item
    while ((idx = s.indexOf(':')) != -1)
    {
        this[i] = s.substring(0, idx)
        s = s.substring(idx+1,s.length)
        i++
    }
    
    // create final array item
    this[i]=s
    this.length = i+1
    
    return this
}

// String to Array
function stringArray(aString)
{
    return aString.split(':');
}

// Array to String
function arrayString(anArray, len)
{
    var s = ""
    
    for (var i = 0; i < (len - 1); i++)
        s += anArray[i]+":"
    if (len > 0)
        s += anArray[len - 1]
    return s
}

// Array to String
function arrayString(anArray, len)
{
    return anArray.join(':');
}