String.prototype.trim = function()
{
    return this.replace(/(^[\\s]*)|([\\s]*$)/g, "");
}
String.prototype.ltrim = function()
{
    return this.replace(/(^\s*)/g, "");
}
String.prototype.rtrim = function()
{
    return this.replace(/(\s*$)/g, "");
}
String.prototype.isNumber = function()
{
    if (isNaN(this))
        return false;
    else
        return true;
};

function makeArray(IntarrSize)
{
  for (var n = 0; n < IntarrSize; n++)
    this[n] = "";

  return this;
}

function customSplit(strvalue, separator, arrayName)
{
    var n = 0;

    if (separator.length != 0)
    {
        while (strvalue.indexOf(separator) != -1)
        {
            eval("arr" + n + " = strvalue.substring(0, strvalue.indexOf(separator));");
            strvalue = strvalue.substring(strvalue.indexOf(separator) + separator.length,
                    strvalue.length + 1);
            n++;
        }
        eval("arr" + n + " = strvalue;");
        arraySize = n + 1;
    }
    else
    {
        for (var x = 0; x < strvalue.length; x++)
        {
            eval("arr" + n + " = \"" + strvalue.substring(x, x + 1) + "\";");
            n++;
        }
        arraySize = n;
    }

    eval(arrayName + " = new makeArray(arraySize);");

    for (var i = 0; i < arraySize; i++)
        eval(arrayName + "[" + i + "] = arr" + i + ";");

    return arraySize;
}


function isEmail(argvalue)
{
    if (argvalue.indexOf(" ") != -1)
        return false;
    else if (argvalue.indexOf("@") == -1)
        return false;
    else if (argvalue.indexOf("@") == 0)
        return false;
    else if (argvalue.indexOf("@") == (argvalue.length - 1))
        return false;

  // arrayString = argvalue.split("@"); (works only in netscape3 and above.)
    var retSize = customSplit(argvalue, "@", "arrayString");

    if (arrayString[1].indexOf(".") == -1)
        return false;
    else if (arrayString[1].indexOf(".") == 0)
        return false;
    else if (arrayString[1].charAt(arrayString[1].length - 1) == ".")
        return false;

    return true;
}